Girls rock

Greenday evidently has a thing they do at their concerts where they invite someone from the audience up on the stage to play a song with them. The audience member often sucks as much as you'd expect of a random person unexpectedly put on stage to play to an audience of tens of thousands. This young lady, however, evidently named Stephanie, is incredible, and absolutely nails the song. I've watched it twice now, and I can't stop grinning.