Macklemore and Ryan Lewis put together a really cool promotional video for the Grammys' "Music Unleades" web campaign, where they surprised a bus-load of New Yorkers with an energetic performance of their hit "Can't Hold Us."  They entered the bus in a low-key fashion until Ryan Lewis pressed play on the big late '80s, early '90s style boom box he was carrying, and they turn the public transit bus into a party bus.  At first, some of the passengers were confused until they realized who they were, but even the ones who remained clueless joined in on the fun.

Check out this awesome performance by Macklemore and Ryan Lewis.