We were wondering the same thing!  Is this really Justin Timberlake?  Yep!

This is right on time for some Cinco De Mayo Celebrating, but Justin’s going “big” in a Lime Head!

Meet Justin’s alter ego, Rick “Sour” Vane.

Check out the shenanigans in the video below.

Mashable was given first access to the story behind Justin and Rick “Sour” Vane.  Good times!