When celebrities aren’t in the public eye, they like to let loose. That was the case for Robert Pattinson and Katy Perry when they performed a duet in 2008 at a karaoke bar.
Rumors have been spreading for the past couple of weeks that superstar Mariah Carey would be joining Justin Bieber on his upcoming Christmas album, but it wasn’t official until Bieber and Carey confirmed it via Twitter and video last night!