Kanye West and Jay-Z Perform "Otis" at the VMAs

It was billed as a surprise performance, but word leaked out well ahead of time.

Still, the crowd went crazy at last night's MTV Video Music Awards when Kanye West and new father-to-be (!!!!!!!!!!) Jay-Z took to the stage for a rendition of "Otis." Off their mega-hit album "Watch the Throne," the single features each artist doing his talented thing.

Watch for yourself:

Kanye West Jay Z - Otis (Live)

Among other VMA performance clips, watch a tribute to Britney Spears NOW and a strange opening from Lady Gaga HERE.