There is a of love at the moment for theboybands in America – especially the Britihs ones who have gone there and made a success recently – like One Direction and The Wanted. There is one person not too happy about it all though – maybe he’s worried his crown of Prince of pop will be taken from him – we’re talking about Justin Bieber. Bieber jokingly punched Siva from The Wanted – and also it was done in a jokey fashion, we bet he meant it really. It happened backstage at The Voice in America, where The Wanted had just performedone of their songs. Bieber apparently just waled right over and punched him in the groin twice. Jay from The Wanted said: "Justin Bieber is a prankster. He pranks people all day. Although I'm not actually sure that what he did to Siva was a prank. We'd done the show and Justin basically just came up and punched Siva hard in the balls. And then did it again. Siva wanted to hit him back, but you can't go around smacking kids… he's only little." Siva backed up what had happened and said: "He came up to me during a conversation and smacked me in the privates. It was a game, a very aggressive game, which was very painful!" Tom then said: "Siva limped into the dressing room and asked 'Why's he picking on me?' It was funny." Siva also jumped on the fact thatt Bieber is little and younger than them and said: "Who'd win in a fight, me or Bieber? Exactly. But you cannot go around hitting children. And anyway, he's got million-dollar sperm… I couldn't possibly go there. But I'll get him back..." Well let’s hope they mnake up in time for recording their duet – The Wanted and Bieber are meant to be getting togetehr to make some music soon!