Music mogul Scooter Braun is living a teenage dream. How many untold millions would start revolutions to have Justin Bieber and Usher perform at their birthday party? Or to have Adam Levine show up and sing "This Love"--winnowing the millions down more, perhaps, but not by much. And there's probably at least a few thousands who'd be excited about MC Hammer or Nicky Hilton making an appearance.

In case you were too lazy to accept your invite, here's some video of Usher and the Bieb doing their respective things. We're not going to name names, but at least a dozen live performers just got outdanced, outsung and outdone.