Irate fans on Sunday heckled flamboyant US pop singer Lady Gaga after she was over an hour late for a public appearance at London's famous Harrods department store. Hundreds of fans had waited for hours to welcome the star, but they described how she rushed past them and into the shop, where she was launching new perfume, Lady Gaga Fame. "It's quite ironic it's called Fame because it just shows how much fame has changed her," said Luke Reader, 18. "She couldn't even spend five minutes talking and having some pictures taken. It's not on." The Poker Face singer was due to arrive at the event in Knightsbridge at 19:30, but finally arrived on a horse-drawn carriage at 20:45.