Any time either Eminem or Rihanna takes the stage, there's going to be a memorable moment. And when they link up at Sunday night's MTV Movie Awards for the first performance of "The Monster," well, that's bound to be big.

To honor the occasion, we take a look back at their relationship.

The Music
When Em and Rih Rih join forces, it's pure gold. Or, pure platinum. Pure multi-platinum, actually.

The two first hooked up for 2010's "Love the Way You Lie," from Em's Recovery. The song was an instant smash, and eventually topped the charts in more than 20 countries. It's the best-selling song of each of their careers and has sold more than 11 million copies.

They followed up that same year with "Love the Way You Lie (Part II)," which was included on Rihanna's Loud. It was neither released as a single nor given a music video, and so it didn't mirror the success of the first. Two years later, "Numb," from Rih's Unapologetic, brought them together again.

It was with "The Monster," though, that they matched the success of "Love the Way You Lie." The fourth single from Slim's The Marshall Mather LP 2 features Rihanna belting an infectious hook between the Detroit rapper's fiery verses. It's already sold three million units domestically, and hit #1 in a dozen countries.

The Performances
In addition to getting together for the music videos for "Love the Way You Lie" and "The Monster," the powerhouse tandem have appeared together on a handful of occasions — but not so often that when it happens, it's not ...

When you have an amazing, hilarious host for the MTV Movie Awards like Conan O'Brien, you can expect one thing: the unexpected. If you expect two things or more, though, here are some of the other things you might expect:

An Epic Opener
Not that we're going to drop any spoilers, but we've heard from a little red-headed bird that the opening to the Movie Awards is going to be huge. This is one you'll want to watch live.

Fire
In the tradition of MTV stars like Beavis, Conan will be bringing fire to the Awards, with multiple explosions and nearly everything (on stage) getting set on flames. O'Brien has promised that at the 40 minute mark he will be seriously injured by the fire, so look forward to that.

Amazing Parodies
Conan is an old hand at the art of the movie parody, and the ones from MTV Movie Awards past are classics. Put the two together, and you've got movie-making-fun-of magic.

Something With Thor
Speaking of parodies, we're getting the weird feeling something will involve the mighty Thor.

A Duet With Eminem
As revealed earlier, Eminem will perform selections from Broadway musical "Guys & Dolls" with Conan. We do have a picture we photoshopped of this happening, so it must be true.

Hittin' On The Ladies
With so many babes in attendance, the notoriously randy Conan is sure to point out some of the hotness in the audience. Hopefully he points out some of the beefcake as well as the cheesecake; and maybe some of the ...

Good news, "Funny People" fans: Judd Apatow and Eminem will finally be reunited at the MTV Movie Awards. As Apatow tweeted:

Before you cry, "random" the duo did work together on Judd Apatow's 2009 directing and writing effort "Funny People," where the rapper made a cameo as himself. But with a few years in between, what will Mr. Mathers and Mr. Apatow be talking about when they sit down at the big show?

Planning A "Funny People" Sequel
Since Apatow has already ventured into the world of sequels and spin-offs with "This Is 40" — which followed characters from hit movie "Knocked Up" — why not also have a "Funny People" spin-off focused on Eminem's classic movie character, Eminem? You could call it "Serious People," maybe? We'll leave the titles up to the professionals.

Tips For Em's "Monster" Performance
We don't have confirmation that Apatow is Eminem's vocal coach, but there's no reason to think that the many-talented man couldn't also help warm up the rapper's vocal chords. At the very least, he could psych him up for his performance. Maybe Ivan Reitman could do the same for Rihanna?

Whereabouts Of That Missing Plane
It seems like every celebrity, from Courtney Love to James Cameron, has a theory about missing Malaysian Airlines Flight 370, so perhaps Apatow and Eminem could hash out their own guesses while waiting for Channing Tatum to accept the trailblazer award.

Planning A Reboot Of "Guys and Dolls"
We've already confirmed that Conan O'Brien thinks Eminem is a "Guys and Dolls" fanatic, so why not hook up with Apatow to direct a ...

On a night as big as the 2014 MTV Movie Awards, you need to get as close to presenters like Nicki Minaj and Seth Rogen, nominees like Channing Tatum and Shailene Woodley and even your host Conan O'Brien as possible.

That's why tonight MTV is bringing you the All Access Live Stream, the place to get an exclusive look at action inside and outside the Nokia Theatre.

The All Access Live Stream is a second-screen co-viewing experience meant to bring you to the MTV Movie Awards red carpet and inside the venue with the help of 17 different camera angles. You'll be able to flip through all of the angles as you like, or you can watch the MTV Cut, a curated mix that will find the best behind-the-scenes moments for you.

You'll be able to watch the feeds through Movie Awards night — even during the show — but you'll have to tune into MTV at 9 p.m. ET/PT to see what's going on inside the big room at the Nokia Theatre. It's the only way you'll be able to catch never-before-seen clips from "The Amazing Spider-Man 2" and "X-Men: Days of Future Past."

On top of all of the amazing things planned for the 2014 MTV Movie Awards, there's a whole lot going on beforehand during the live pre-show. That's where you'll be able to get your first look at all of the celebrities making appearances at the show, as well as an exclusive clip from "The Fault in Our Stars."

Watch The Movie Awards All Access Live Stream Now!

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