Christina Aguilera

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).

From Kanye West to Lady Gaga, these songs faced serious backlash.

'She don’t wanna get dirrty.'

Christina Aguilera is heading to Las Vegas.

Celebrate the 20th birthday of these nostalgic albums from 1999.

Christina Aguilera has Lady Gaga's back.