Christina Aguilera

S Club 7 and these 20 other underappreciated pop albums brought the sunshine two decades ago.

Miley shared some NSFW Valentine memes.

Check out cringe-worthy fashion fails from our favorite celebrity couples.

'I’ve been fighting for my last name my whole life.'

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

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

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

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).