I didn't have a chance to see this when it aired, but everyone online (Twitter, Facebook etc etc) is talking about the mash-up of "Gangnam Style" on last night's American Music Awards show.  Psy (the singer of Gangnam Style) wrapped up the show with a performance of the song...and mid way through, he brought out MC Hammer.  Hammer didn't rap, but he danced with Psy to the mash -up of "Gangnam Style" & Hammer's tune "Too Legit To Quit."  Check out the performance....