Happy Birthday, Mr. President! Yes, in between campaigning and being the leader of the free world, Barack Obama is celebrating his 51st birthday today, so, Prez, this one's for you.

We had a hard time deciding what to get the POTUS for his big 5-1. So we went with the obvious: a roundup of hilarious videos. Specifically, we've rounded up the top five best BarackDubs videos -- yep, that's right -- our President "singing along" to some of the hottest songs of the year!

Sexy and I Know It - LMFAO

Related Article: GO VIRAL: Barack Obama & The Miami Dolphins Cheerleaders Take on 'Call Me Maybe'

Call Me Maybe - Carly Rae Jepsen

Boyfriend - Justin Bieber

What Makes You Beautiful - One Direction

Born This Way - Lady Gaga


Which BarackDubs video was YOUR favorite?! And which song do you want to see get mashed up next?