Kanye West

Justin got the crowd to join in.

Reppin' hip-hop on your chest.

Eminem loves rap.

From Kanye West to Courtney Love, check out 25 of the craziest onstage celebrity meltdowns over the years.

Looking back on the decade's most attention-grabbing Twitter account.

Nothing like a good awkward meme.

Together again.

Ashlee Simpson is just one of many stars who bungled sets on TV's most coveted stage.

He believes.

From Katy Perry to Kim Kardashian West, find out who got their start working for other famous celebs.