"Billionaire" is a song by Travie McCoy and Bruno Mars. Justin Bieber and Sean Kingston covered the song and is on the "Our World" mixtape which never released but Sean played the song on Ustream. A few years later Justin covers the song again while doing the Forbes photoshoot with Scooter Braun (his manager).
I wanna be a billionaire so so bad
Buy all of the things I never had
I wanna be on the cover of Forbes magazine