Britain's Got Talent's Alesha Dixon was brought to tears as she hit the Golden Buzzer for a choir led by a heroic eight year old boy facing a brain tumour, named Ravi.The latest episode showcased 'Ravis Dream Team', a multi-generational choir of individuals aged five to 78.Their emotional performance of 'A Million Dreams' from box-office hit The Greatest Showman, saw the youngster leading the group straight to the shows semi-finals. Ravi was one of last years Pride of Britain winners, where he received the recognition of Child of Courage for his strength and fundraising efforts.