Singer Beyonce has landed a trio of trophies at the MTV Europe Music Awards in Berlin. The singer fought off rivals including Leona Lewis to win best female, plus best song for Halo and best video for Single Ladies (Put a Ring on It). She dedicated her best video award to rapper husband Jay-Z, saying: "There's only one person I want to thank and that is Jay for putting a ring on it." Singer Katy Perry hosted the ceremony for the second year in a row. The singer - who is dating comedian Russell Brand - performed a medley of the five best song contenders, including Halo and Kings of Leon's Use Somebody. She set the tone for the evening by asking the crowd: "Are you feeling sexy, Berlin?" and managed to squeeze into seven separate costumes during the ceremony. 'Great deal' The ceremony was held in the city to mark the 20th anniversary of the fall of the Berlin Wall. U2, who won best live act, played a free open-air concert at the Brandenburg Gate to coincide with the event. As well as performing One - inspired by the fall of the Berlin Wall - the band played Sunday, Bloody Sunday, on which they were joined by Jay-Z.