10 Embarrassing Celebrity Moments

Sept. 29, 2012: The day vom went viral.

Justin Bieber throwing up onstage at a concert in Vegas

In 2005, the pop star wet her pants while performing live. "I was late, so I didn’t go to the restroom before I went on stage," she said later. "It was horrible, but whatever, it happened."

You can't not feel bad for Taylor as she struggles through a 2010 performance, gagging several times and appearing to be on the verge of throwing up. When the song ends she regains her composure, telling the crowd, "I almost threw up in that song. I got fucking heat stroke, man!" as she removes her jacket.

The "Blow Me (One Last Kiss)" singer is known for her daring aerial performances, but when a technical snafu occurs as she's being strapped into her harness, it sends her tumbling off the stage. She lands upright, but appears shaken and exclaims that she can't feel her foot. "Sorry, y'all!" she says apologetically to the fans around her.

A rogue gust of wind had its way with her skirt during a 2011 performance of "You Belong With Me."

Has an epic tumble onstage—then gets right back up and keeps doing her thing.

Fall—or performance art? With Gaga, it's hard to tell.

After a major SPF fail, the reality starlet tweeted, "I fell asleep with huge glasses on…. This tan line is not ok!!!"

The Internet had a collective WTF moment when the pop star was photographed with mysterious brown blotches on her leg. They turned out to be self-tanner streaks.

2012
The singer bites it during a performance of "Best I Ever Had" and has to be helped offstage.