We don't expect celebrities to genuinely be good at the video games they appear in, but one would think that Metallica drummer Lars Ulrich could play his own band's songs in Guitar Hero. But no...

In an interview with Canadian radio station KBS, Metallica's outspoken and occasionally loathed drummer Lars Ulrich explains — albeit vaguely — why his band is a Guitar Hero band, not a Rock Band band. He says that the gang behind Guitar Hero was "ready to step up on a number of fronts and it's been great," whatever…