Singer Jon Bon Jovi has launched a scathing attack at British rockers Oasis and pop star Robbie Williams - insisting their music is so bad they "couldn't fill a bar". The Livin' On A Prayer hitmaker also hits out at troubled Babyshambles frontman Pete Doherty and pokes fun at soccer ace David Beckham in the new issue of Glamour magazine. He says of Williams, "That guy? He couldn't fill a bar. He couldn't even sell 500 tickets. "(Oasis) couldn't fill a bar, either - and they're full of themselves. He adds of Doherty, "We're not familiar of anything other than his antics and the fact that he's always in trouble - I've never heard a single one of his songs." But Bon Jovi's most bitter comments were reserved for LA Galaxy's Beckham, who he ridiculed by asking, "Is he past his prime?"