British pop star Lily Allen insists she will never return to America following a recent U.S. working visa revocation. The Smile singer was unable to renew her working visa in the States recently, reportedly because of her assault on a photographer in London earlier this year (07). But Allen insists she doesn't care. Speaking at England's V Festival on Sunday (18Aug07), she says, "I'll never go back there. The immigration officers are a bunch of w**kers."