Stars who are savvy with social media have been sharing more and more behind-the-scenes videos with their fans. This week, Britney Spears showed off the dingy locker room she had to get glam in, while Justin Bieber and Jimmy Fallon turned the camera on themselves to share the start of a new funny duet. Check out those clips and even more fun footage in today's PopSugar Rush.
Get It, Get It, Kaley Cuoco! Big Bang Star Pays Ab-Tastic Homage to Britney Spears on Lip Sync Battle
This Throwback Jennifer Lopez and Marc Anthony Grammys Performance Is Basically a Live Telenovela
Halsey's NSFW Justin Bieber Cover Is Exactly What You Need to Get You Through the Weekend