Enter the competition to win amazing prizes between 22nd Feb -- 22nd Mar and follow all the action at www.bbc.co.uk/backsides and on radio 5live. McBusted drummer Harry Judd takes on the Celebrity Sit Off. He has two minutes to sit on as many Wembley seats as possible in support of Robbie Savage and Alan Shearer. Harry announced that McBusted will be donating tickets to their Hyde Park concert to the Battle of the Backsides competition. Enter the competition here: www.bbc.co.uk/backsides Alan Shearer and Robbie Savage race to be the first to sit on 45,000 seats at Wembley Stadium. If you donate £5 to the cause you can enter a competition to win prizes including tickets to the World Cup and One Direction concert tickets. Find out more about Sport Relief: bit.ly/1cqcGHG

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