is back with a vengeance. Not only did we see the return of the original four coaches: Adam Levine, Blake Shelton, Christina Aguilera and Cee Lo Green, but a stellar new group of guest mentors.

Ryan Tedder, Miguel, Ed Sheeran and Cher made their debut on Monday night as battle rounds kicked off, offering their expertise to the up-and-comers vying for a spot on their coach's final team. But dishing advice isn't as easy as it seems, and not all the guest mentors stepped up to the plate as expected.

We broke down their performance during their first week on the job.

Ryan Tedder (Team Adam)
His musical prowess was on display from his first bit of advice. "You have such a powerful voice, don't do the break with it," the OneRepublic frontman told contestant Grey. "The tendency of people who perform hits songs is they get comfortable with it and mess with the melody which comes across loungy." The Grammy-winning songwriter (Beyoncé's "Halo" and his band's "Apologize") and producer (Jennifer Lopez and Demi Lovato) gives contestants specific advice, all with a super zen, laid-back approach. He clearly listens and seems invested in their growth, offering relevant suggestions that pay off.

There isn't much for Tedder to improve as a mentor besides maybe pulling some out-of-the-box, Usher-esque music techniques out of his bag. That'd be fun.

A+

Miguel (Team Cee Lo)
The 2013 Grammy winner's strength as a mentor is his own vocal background. The R&B crooner, who has collaborated with the likes of Mariah Carey, can break down the nuances of the singing ...

is back with a vengeance. Not only did we see the return of the original four coaches: Adam Levine, Blake Shelton, Christina Aguilera and Cee Lo Green, but a stellar new group of guest mentors.

Ryan Tedder, Miguel, Ed Sheeran and Cher made their debut on Monday night as battle rounds kicked off, offering their expertise to the up-and-comers vying for a spot on their coach's final team. But dishing advice isn't as easy as it seems, and not all the guest mentors stepped up to the plate as expected.

We broke down their performance during their first week on the job.

Ryan Tedder (Team Adam)
His musical prowess was on display from his first bit of advice. "You have such a powerful voice, don't do the break with it," the OneRepublic frontman told contestant Grey. "The tendency of people who perform hits songs is they get comfortable with it and mess with the melody which comes across loungy." The Grammy-winning songwriter (Beyoncé's "Halo" and his band's "Apologize") and producer (Jennifer Lopez and Demi Lovato) gives contestants specific advice, all with a super zen, laid-back approach. He clearly listens and seems invested in their growth, offering relevant suggestions that pay off.

There isn't much for Tedder to improve as a mentor besides maybe pulling some out-of-the-box, Usher-esque music techniques out of his bag. That'd be fun.

A+

Miguel (Team Cee Lo)
The 2013 Grammy winner's strength as a mentor is his own vocal background. The R&B crooner, who has collaborated with the likes of Mariah Carey, can break down the nuances of the singing ...

Lady Gaga is inviting a few special guests to spend the holidays with her. The ARTPOP singer has reportedly filmed a holiday special with the Muppets.

The show was shot in Los Angeles, E! reports, but an airdate for the television event has yet to be revealed.

Any good Little Monster knows that Gaga has a deep history with the Muppets, which dates all the way back to 2009. MTV News takes a look back:

Gaga first entered the Muppets' cartoony world when she famously sported a dress made entirely of Kermit The Frog dolls back in July of that year. Months after she rocked the Jean Charles de Castelbajac-deigned frock on German TV, the Mother Monster took her fandom for the Jim Henson-created characters to the next level. She actually walked the carpet of the 2009 VMAs with Kermit.

At the time, the amphibian icon left the singer quite impressed. She told MTV News on the carpet how much she enjoyed having the chance to go out with Kermit, which we're sure left his longtime love Miss Piggy green with envy. "He's been a really good date," Gaga said. "It's our first date, but we've been eyeing each other for a while."

In the days after the twosome caused a stir together, Kermit opened up about the date, denying that any romance was brewing between them despite sharing a kiss on the carpet.

"Well, I wouldn't really call it a 'date' — at least not if I don't want to end up as a coat for Miss Piggy. Y'see, ...

It is her party and Miley Cyrus will do what she wants to. Including debuting at #1 thanks to 270,000 copies sold of Bangerz, according to figures provided by Nielsen SoundScan. The singer easily tops the Billboard 200 tally with her heavily hyped disc, which includes the #1 hits "Wrecking Ball" and 


Miley Does It
While Cyrus bested the early sales predictions for Bangerz, her debut was well short of big first weeks by some established peers including Justin Timberlake
, Jay Z and Drake. And though it didn't match the first-week number of 2008's Breakout (371,000), it did give Cyrus her fifth #1 career debut.

Panic! And Pusha
Panic! At The Disco had a strong #2 debut well behind Cyrus with Too Weird To Live, Too Rare To Die!
, matching their previous high first week position.

It was also a career week for the Clipse's Pusha T,, who landed at #4 with his frequently delayed solo debut, My Name is My Name.


JT And Drizzy Tumble
Drake's Nothing Was The Same (83,000) was down another 44 percent in its third week, but the album only slipped one spot to #3 as it steamed toward the 900,000 mark. The news was not nearly as good for Justin Timberlake, whose The 20/20 Experience — 2 Of 2 was down 80 percent in week two, dropping four spots to #5 on sales of nearly 70,000.

While JT still easily owns the year's best selling album with the first part of 20/20, his huge tumble is one of the largest percentage drops for a ...

DJ Khaled says he's Suffering From Success, but he isn't the only one. His buddy Chris Brown seems to be still reeling from his high-profile breakup with Rihanna.

On Tuesday, the charismatic We the Best DJ dropped "I'm Still," a new track from his October 22 album, which features Wale, Wiz Khalifa, Ace Hood and Chris Brown. On the album version of the song, Breezy sings the hook and toasts to his haters, vowing that he's "still gonna end up on top."

The unreleased version, however, which made its way onto the Internet, has a rap verse from Brown and a drastically different tone. He makes subliminal mentions of the two loves of his life: Karrueche Tran and Rihanna. "You n---as mad 'cause you f---in' with dem regular hoes, and ain't nothin' better than my Asian/ Hol' up wait, n---a f---in' with my patience, 'cause I'm that n---a give a f--- about a racist," he begins his rap verse.

Brown goes raps aggressively, blowing off steam, spitting lyrics about pulling triggers, his diamond collection and his cold heart before he delivers the line that seems to be directed at Rih Rih.

"Now every n---a in the industry done f---ed my bitch/And all my n---as said, 'I told ya,' " he rhymes without saying her name.

In June 2012, Chris Brown and Drake were involved in a brawl in a New York City nightclub, and their respective relationships with Rihanna were said to be at the root of their issues, which they have reportedly put behind them.

Last October, Chris ...

For more than a month now, a rather resolute group of Ke$ha fans have been circulating a petition to free their favorite artist from the clutches of producer Dr. Luke, whom they accuse of stunting her growth as an artist by forcing her to sing "the same generic, predictable, recycled pop songs."

To date, the petition has been signed by more than 3,000 fans, and now, the "Free Ke$ha" movement is presenting its most compelling argument to date: a pair of unreleased (and decidedly De-Lukeified) demos that not only find Ke$ha flying her freak flag, but showcase her voice rather than the Good Doctor's studio polish.

One track, "Dirty Liar," has Ke$ha soulfully singing about a honey-lipped lover who's done her wrong, complete with sassy backup singers, dramatic strings, a harmonica line and a loping backbeat reminiscent of early-'90s Trip Hop. The second song, "First Love," is less of a departure; in fact, its melodies and whirring electronic burbles recall the Warrior single and, of course, she's once again mentioning ghosts. But, as she sings about her first flame, you can't help but notice the fragility in her voice ... a trait that, more often than not, is flattened out of her finished songs.

"First Love" was supposedly taken from Ke$ha's Cannibal sessions (no word when "Dirty Liar" was recorded), and it's not exactly clear how the "Free Ke$ha" folks got their hands on either song ... though both tracks are now available on the Movement's first-ever mixtape — a 14-track album called What ...