Lady Gaga

These acts truly shook things up when they took the stage!

Sounds like a cool collaboration.

He has solid reasoning.

The singer shares a complimentary view of the pop star.

Now that would've been a sick collaboration.

Demons, gravestones, blood and motorcycles on an album cover often mean you're about to hear some metal. But not always.

James Hetfield had to overcome mic issues during Metallica's collaboration tonight with Lady Gaga at the Grammys.

Kristi Capel, a newscaster at WJW-TV Fox 8 in Cleveland, is probably going to want this one back. On Monday while talking about Lady Gaga's performance at The Oscars, where she sang a musical medley tribute to "The Sound of Music," it seemed like Capel was trying to pay Lady Gaga a compliment. But she failed miserably.

Did we miss something at Fashion Week? Is barf the hot thing this season, because we thought it was going to be brocade? Now Lady Gaga AND Justin Bieber have barfed onstage in the past week. We will give Gaga props for not letting it stop her. Because that is seriously a lot of ralph.

As Saturday bled into Sunday at Bonnaroo 2012, Alice Cooper took the stage at midnight for a 90-minute performance that turned many heads. Having shocked and rocked his way around the world for nearly 45 years as Alice Cooper, the iconic frontman delivered one of the most jaw-dropping performances of his career at the festival, covering the Lady Gaga hit, ‘Born This Way.’

I have no idea who this dude is, and I can't understand half the s*&% he says, but this video is pretty damn funny.