Regulator says Dermot O'Leary should not have encouraged viewers to download songs by Diana Vickers and Michael Bublé ITV1's The X Factor was today criticised for breaching product placement rules after presenter Dermot O'Leary appeared to encourage viewers to download songs by guest acts Diana Vickers and Michael Bublé. Ofcom investigated the Simon Cowell talent show over concerns that O'Leary ...