The more we learn about Lady Gaga's ARTPOP the less we know about what to expect. While she's given us some of her classic dance pop with first single "Applause," a rehearsal video the singer uploaded on Thursday (August 29) shows that it won't be all flashing lights and thumping beats.

The one-minute clip is a teaser for Gaga's headline appearance on Monday at London's Roundhouse as part of the month-long iTunes Festival. She teased fans about it on Wednesday with a provocative picture of herself standing next to a dancer who's wearing a metal pig gas mask along with the message, "REHEARSAL PIC #SWINEFEST #GETREADYTOSQUEAL."

What she revealed on Thursday was a snippet of an ARTPOP track reportedly called "Swine," which has a driving, industrial rock groove that's reminiscent of Nine Inch Nails. The teaser opens with Gaga seated at a keyboard singing, "I know, I know, I know you want me/You're just a pig inside a human body," as her band patiently waits their turn to chime in. "Squeal-a, squeal-a, squeal-a you're so disgusting!"

Though the subtle groove continues, the scene changes to Gaga — wearing black tights, a long white t-shirt and a black wig — bashing away at cymbals on a stripped-down drum kit, her hair flying, while playing keyboards with her left hand.

Eventually the band kicks in with a classic rock-like heavy guitar groove that explodes into a galloping industrial sprint, with Gaga continuing to bash away at a cymbal with a yellow drum stick and yelling, "Swine!" Gaga has promised to play ...

Tom Hiddleston won't be back as Loki for but that doesn't mean the God of Mischief is far from sight.

Indeed, Hiddleston rejoins the Marvel Cinematic Universe as soon as November's a project the actor describes as "a sequel to 'Avengers' as much as it is to 'Thor.'" (You can see an exclusive trailer cutdown for "Thor: The Dark World below.)

"It's a roller coaster, no question," Hiddleston told MTV News during our recent Fall Movie Preview interview. "It's full of ups and downs and loop-de-loops and twists and turns. It will take you to places you haven't seen before."

In the upcoming "Thor" sequel, the titular God of Thunder brings his hammer to bear upon Malekith the Accursed, leader of a forgotten foe known as the Dark Elves. "They have an ancient, ancient grudge against Asgard and against the reign of Odin, and they're back," Hiddleston described of the "massive and threatening" enemies facing Thor this time around.

But never count Loki out of the fight. Even as most eyes are turned toward Malekith, Hiddleston's very own mischief-maker remains a thorn in his brother's side.

"Loki has a very complicated relationship with Thor," Hiddleston said of his role in the film. "He is an agent of chaos without equal in the world he inhabits. He knows his true nature. He knows he doesn't belong in the family of Asgard, and he's locked away in the beginning of the film in the deepest, darkest recesses of the dungeon as public enemy number one."

It's not long before foe becomes friend, however, ...

Before Katy Perry gave a knock-out performance of to close out the 2013 Video Music Awards, she gave her fans a taste of what's to come on her upcoming album, Prism.

Fans had the opportunity to choose whether both off Prism, would get an early release on September 17. After several fierce days, Katy Cats voted "Dark Horse," featuring Juicy J, to be the chosen track.

And since fans only got a small taste of "Dark Horse," we asked Perry what we can expect from the track.

"It's kind of a juxtaposition. It's got me, a pop artist, with a little bit of an urban kind of hip-hop-flavored background soundtrack to it, and the lyrics are kind of witchy and dark, as if I was a witch warning this man not to fall in love with me, and if you do know I'm going to be your last," Perry revealed of the Dr. Luke- and Max Martin-produced track, which she wrote with her friend Sarah Hudson in her hometown of Santa Barbara, California. She went on to describe it as having a "witchy, spell-y kind of black magic-y idea."

As for "Walking on Air," fans will have to wait until Prism's release on October 22 to hear the song in full, but she did divulge that the high energy-track came about in an unusual kind of way. It all started when she and a friend were strolling in Central Park and she saw a group of people roller-skating to deep house music.

"I looked at her and I said, ...

The boys of One Direction have accomplished a lot in 2013: their second headlining tour, a 3-D documentary and a Moonman for Song of the Summer at the VMAs. Now, they're ready to check another thing off their list.

The follow-up to their widely successful 2012 album, Take Me Home, will reportedly be released around the holidays. When we caught up with Liam Payne at the New York premiere of their doc, he warned Directioners to look out for a much edgier sound on their third album.

"[It's a] very rock direction," Payne said. "We actually spent a lot of time writing this album. We're very proud of it, so we can't wait for it to come out.

"It's very live sounding, very rock-y," he continued, before also describing it as "quite retro." "But it's very different so we are hoping people will kind of adjust to the music with us."

According to reports, the guys are working with the same songwriting team behind their 2011 debut, Up All Night and Take Me Home, including producer Julian Bunetta. And the U.K. boy band recently told "Nightline" that they have penned 10 of the tracks on the record.

"[We] had the chance to work with a lot of great writers and stuff, but we just made it a bit more edgier," Liam Payne explained at a press conference back in May. "Just subtle changes here and there so it kind of grows as we grow."

Ryan Raddon, better known as Kaskade, has been nominated for Grammys, has sold out the Staples Center and had 12 top 10 singles, but he still isn't satisfied. For his eighth studio album, he laid down his own vocals on the title track for the first time ever.

MTV News caught up with the EDM veteran to get to the bottom of all things "The song's about me and my story and being true to myself, getting to this point in my life and following my passion and not being affected by everything that is going on around me. It's a very personal song and it just made sense to name the album that and then, cool, we'll call the tour that too."

Certainly a rarity in electronic music, Kaskade said he was a bit nervous recording his voice on the track, but performing it live has been rewarding. "I was a little shy about that, a little nervous just cause I've never done it before but it's been awesome, now I play the song at shows and to see everyone singing along and seeing how it resonates with my audience is very rewarding, I love that, the aspect of sharing my art."

The tour is being dubbed the Big Rooms Small Tour, which was a very intentional stylistic decision by Kaskade, who felt the album played best to the biggest room possible. And as Kaskade teased, maybe he will sing live.

Luckily, the album comes out on September 10, just in time to hold fans over before his first show ...

'NSYNC's long-awaited reunion a at the VMAs had fans, including A-listers like Taylor Swift and Lady Gaga, screaming with delight.

For almost a decade, the five members held different opinions about whether they would ever grace the stage together again. But with one phone call from Michael Jackson Video Vanguard award winner Justin Timberlake, they got the group together again.

Now, fans might be wondering how the reunion came together. So MTV News spoke to JC Chasez and Chris Kirkpatrick to get the inside scoop on it. Here are five secrets behind 'NSYNC's VMA reunion!

Two Cities, Five Guys And A Reunion
The fivesome didn't just rehearse their portion of Timberlake's epic performance in NYC, but also headed to Florida, the same state they formed in, to rehearse. "We were rehearsing at the Fillmore in Miami last week. Justin really wanted it to be a secret and he wanted it to try and be as quiet as possible 'cause he wanted it to be this moment," Chris recalled. "We tried to keep it as secretive as we could." Chasez added, "The main thing is just how quickly it came together; it came together just within a matter of days. It started with a phone call just a few days before the VMAs basically. [The rehearsals were] very relaxed, a lot of jokes being passed around at each other's expense, but again, it was fun."

Mic Check!
Despite the band not saying anything prior to last Sunday, when an official Twitter account was opened in the band's name on Saturday, that's ...

It was an unforgettable speech — a moment when those gathered could feel, and hear, the tide of history turning.

On Wednesday (August 28), thousands once again descended on the National Mall in Washington, D.C., to commemorate the 50th anniversary of slain civil rights leader Martin Luther King Jr.'s landmark "I Have a Dream" speech. Delivered on August 28, 1963 during the "March On Washington," the 17-minute speech encapsulated the civil rights icon's message of freedom, equality and liberty for all Americans, regardless of race.

"I have a dream that one day this nation will rise up and live out the true meaning of its creed: 'We hold these truths to be self-evident: that all men are created equal,' " King said on that day.

"And when this happens, when we allow freedom to ring, when we let it ring from every village and every hamlet, from every state and every city, we will be able to speed up that day when all of God's children, black men and white men, Jews and Gentiles, Protestants and Catholics, will be able to join hands and sing in the words of the old Negro spiritual, 'Free at last! Free at last! Thank God Almighty, we are free at last!'"

Most amazingly, King essentially freestyled toward the end of the speech after gospel singer Mahalia Jackson shouted, "Tell them about the dream, Martin," tossing his notes and coming up with the iconic phrasing on the spot.

MLK's March On Washington Turns 50: Here Are 4 Ways You Can Take Action.

"I Have a Dream" also ...

There's not a whole lot of change atop the Billboard charts this week, with Katy Perry maintaining her grip on the Digital Songs chart and Luke Bryan staying at #1 on the albums chart. The real action was over on iTunes, as several stars experienced massive boosts in sales following the MTV Video Music Awards. Let's just say Kanye West and Justin Timberlake were probably happy they decided to show up.

JT, Kanye and Miley Get Big Bumps

Though the full impact of the VMAs won't be felt until next week's Billboard charts — this week's charts reflect the sales week that ended on Sunday, the day of the broadcast — based immediate iTunes data, well, being on the big show was definitely good for business: basically anyone who graced the stage experienced a serious bump in sales in the hours following the telecast.

Kanye West's "Blood on the Leaves" shot up an incredible 1187 percent in sales, while Justin Timberlake was close behind, posting a whopping 1,876-percent increase in sales. Lady Gaga saw sales of "Applause" increase by 115 percent, Katy Perry's "Roar" jumped 25 percent, and Miley Cyrus and Robin Thicke both reaped the benefits of their scandalous collaboration, as Cyrus's upcoming Bangerz rose to #5 on the iTunes album chart, and Thicke's new single, "Give It 2 U" jumped 30 percent in sales.

Katy's "Roar" Rules Once Again

It's a second week atop Billboard's Digital Songs chart for Katy Perry, as "Roar" sold another 392,000 downloads to hold on to the #1 spot. Robin Thicke's ubiquitous "Blurred ...