Watch Welsh choir Only Boys Aloud's awesome Britain's Got Talent audition in full! All 133 members of Only Boys Aloud sang their hearts out to impress Britain's Got Talent judges Simon Cowell, David Walliams, Amanda Holden and Alesha Dixon. See more from Britain's Got Talent here: http://itv.com/talent http://twitter.com/gottalent http://twitter.com/OnlyBoysAloud http://www.facebook.com/BritainsGotTalent