New US TV show Lip Sync Battle is the gift that keeps on giving when it comes to celebs mucking about and having fun.

First we got a glimpse of Dwayne Johnson (aka The Rock) miming to Taylor Swift's Shake It Off - and now there's a video of Justin Bieber mimicking Ozzy Osbourne!

And the pop heart throb is surprisingly convincing as the veteran rocker in the teaser clip of him lip syncing to Ozzy's Crazy Train.

Sporting eyeliner and a long wig, 21-year-old Biebs doesn't hold back as he rocks out - capturing Ozzy's wide-eyed delivery perfectly.

The fun game show is hosted by rapper LL Cool J with Chrissy Teigen providing colour commentary.

Other celebs taking part include Teigen's hubby John Legend, Common, Jennifer Lopez, actor Will Arnett, Anne Hathaway, Anna Kendrick, Emily Blunt, Mike Tyson, Meghan Trainor, Queen Latifah and Julianne Hough.

The show is set to be broadcast on a new UK channel called Spike, though obviously we'll bring you the best videos as they arrive!