#TBT: Who’s This Mystery Celebrity? [PHOTO]

Sure, we all had an awkward stage growing up...but I can not believe that this guy grew up to be a man that I REALLY enjoy seeing in his tighty whities.  Can you guess who this celebrity grew up to be?

I can hardly believe I'm saying this, but that was Calvin Harris in 2008! Man did Taylor Swift's new boy toy grow up into one hunk of a man!