Anna Kendrick, John Krasinski, Dwayne “The Rock” Johnson, Jimmy Fallon and more will be lip syncing for Spike's Lip Sync battle. It started on The Tonight Show Starring Jimmy Fallon and now it's gone on to be something even bigger.

Thanks to Emma Stone, Will Ferrell, Joseph Gordon-Levitt and more, this thing is going to be huge.

The Lip Sync Battle will debut on Spike TV on April 2. And Anna Kendrick will be tackling J.Lo's "Booty."

And she'll even have help from J. Lo.

And John Krasinski is going to be dressed like this:

And Stephen Merchant will be dressed like Christina Aguilera. 

Looks good!