What's your favorite thing to do when you have some down time?
For Keenan Cahill it's lip-syncing to songs in his room.
The 15-year-old (he looks more like he's 10) became a YouTube celebrity almost overnight with his breakthrough rendition of Katy Perry's "Teenage Dream," which she publicly recognized on her Twitter page.
Becoming a national superstar for lip-syncing? Sweet gig.
But now -- Cahill's making duets. And we're not talking with mom and dad. Looks like a certain celebrity has stopped by his Chicago suburban pad to make a special appearance.
See what rap mogul joined forces with Cahill after the jump:
Rapper 50 Cent surprised viewers by coming through the bedroom door into Cahill's bedroom to accompany his lip-sync to "Down on Me," a track he collaborated on with Jeremih.
The rapper kneels down, sings with the teen, and then puts his diamond chain around his neck. The two top off their performance with some synchronized swaggalicious dancing. Can you say life goal accomplished?
The spot premiered last night on Chelsea Lately after Handler interviewed him about his newfound stardom.
Whether or not 50 was doing this as a favor to his lady friend (Handler and the rapper are reportedly dating) -- it's unclear. One thing we do know: Not only is Cahill hilarious and adorable, but clearly he's done a pretty good job at making a name for himself.
Check out the video here:
What do you think of Cahill's YouTube fame? What celebrity would you want to lip-sync with?