AOL.com Video - Britney Dances to Vanilla Ice, Bieber Fever in Japan, and More Celebrity Viral Videos

VIDEO:Entertainment

Britney Dances to Vanilla Ice, Bieber Fever in Japan, and More Celebrity Viral Videos

Description:Our favorite social-media-savvy stars continued to delight us by sharing behind-the-scenes and candid clips online. From Britney Spears busting a move during The X Factor auditions to Brad Pitt's brother starring in a clever ad campaign, we've gathered the best viral videos of the week in today's PopSugar Rush. (3:47)

Source: PopSugarRush

Tags: PopSugar , britney spears , justin bieber , Sofia Vergara