Recently revealed new-daddy-to-be Jay-Z and his 'Watch the Throne' collab partner Kanye West give a surprise performance at the 2011 MTV VMAs!

The hip-hop kings gave a high-energy performance of their 'Watch the Throne' lead single 'Otis' in front of a huge American flag.

Rocking casual, almost too-cool-to-care street clothes, Jay and Kanye set the stage on fire, while sparklers were set ablaze behind them.

Lady Gaga may have been a hard opening act to follow, but we're sure everyone will be talking about this momentous and unexpected surprise addition to the VMA performance line-up tomorrow!