Great Ormond Street Hospital Children's Charity:
Olly Murs with Kulsum
Great Ormond Street Hospital Children's Charity:
Mia-Olivia with Shayne Ward
Great Ormond Street Hospital Children's Charity:
Joe McElderry meets patient Joseph
Great Ormond Street Hospital Children's Charity:
Leona Lewis meets patient Myles
Great Ormond Street Hospital Children's Charity:
Alexandra Burke meets Joe and mum
Great Ormond Street Hospital Children's Charity:
Shardonnay meets Kye Sones
Great Ormond Street Hospital Children's Charity:
Melanie Masson, X Factor contestant 2012
Great Ormond Street Hospital Children's Charity:
Leon Jackson and Lucy
Great Ormond Street Hospital Children's Charity:
Ray Quinn and Tasleem