Christina Aguilera

Check out questionable and unfortunate hairstyles from Jennifer Lopez to the Jonas Brothers.

These are possibly some of the worst fashion moments of all time — or at least the '90s.

These reported celebrity-fan encounters are totally cringe-worthy... if they're true.

Our favorite, once-inseparable celebrity besties and their unfortunate fallouts.

Get all the details for perfect NYE viewing tonight!

From Lady Gaga to Roseanne Barr, revel in the best — and worst — renditions of 'The Star Spangled Banner' celebrities have to offer.

The 2000s had some pretty questionable celebrity fashion moments.

From Justin Timberlake to Britney Spears, find out where your favorite '90s and 2000s pop stars are today.

Kelly revealed the news to Christina on air!

Xtina's debut smash hit turned 20 today (June 22).