Only Boys Aloud are a thirty two piece Welsh choir, who finished third in Series 6 of Britain's Got Talent. They hailed from the Welsh Valleys and believed passionately in the tradition of Welsh male singing and wanted to ensure the tradition remained in Wales in a hundred years time. They were students aged between 14 & 19 at the time of their audition.

In their audition two members entered the stage alongside the choirmaster. The two members then began to perform 'Calon Lan' under the direction of the choirmaster, however midway through their performance the remainder of the choir walked onto the stage having been waiting backstage with hosts Ant & Dec until this moment. Towards the end of their performance they received a standing ovation from the audience for a brief period of time, before this later occurred again at the end of their performance. Amanda commented that the choir had brought a 'lump to [her] throat and a tear to [her] eye', adding the fact that she found their performance 'really moving'. Simon added that he had a 'very, very good feeling about you lot', adding he had never heard the song before however 'loved it', and believed that the choir were 'amazing'. They advanced onto the following round and later reached the Semi-Finals.

They were the closing act of their Semi-Final. In the Semi-Finals they performed 'Gwahoddiad', beginning their performance with the stage unlit and with one member of the choir performing alone, before he then began to perform with several other members of the stage, as it began to gradually light up in order to show the faces of each of the members as they began to perform. They advanced onto the Judges Vote and received two votes from Amanda & David, whereas Simon & Alesha had both voted for their opposition The Mend, sending the vote to deadlock. Following this deadlock it was revealed that the choir had placed second in the earlier Public Vote, whereas The Mend had placed third, therefore meaning that the choir advanced onto the Final.

In the Final they once again performed 'Calon Lan', with but one member singing to begin their performance, before the camera panned to the background of the stage, before the walls at the back of the stage began to open, however the majority of the choir walked from the sides of the stage onto the stage, with two members walking down the large staircases located either side of the stage onto the stage. Following their performance, the choir ultimately concluded the Final in third place behind both Ashleigh and Pudsey & Jonathan and Charlotte.

After BGT

Only Boys Aloud released their self-titled album in November 2012; this failed to chart, however 'Only Boys Aloud - The Christmas Edition', released in December 2012, reached #32 in the Official Albums Chart. They released their second album, 'A New Generation', in 2018.

They joined forces with Only Men Aloud to perform on the latters final night of their tour at Motorpoint Arena Cardiff. In August 2012 the choir performed and revealed that they had signed a record deal with Relentless Records-Sony Music at The National Eisteddfod of Ebbw Vale. They later teamed up with the runner up of Series 6 of Britain's Got Talent Jonathan and Charlotte to release a track titled The Promise. The choir appeared on This Morning, Songs of Praise, Who Wants To Be A Millionaire: Christmas Specials, All Star Christmas Presents, Stepping Out with Katherine Jenkins, and as guest performers during The X Factor final in 2012. Ryan Howell, one of the choir members unfortunately died from bone cancer in 2015.

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