The mother of a Preston boy who hurled a custard pie at Cheryl Cole's face said it had helped to raise £16,000.
Diane Small's son, Cameron, covered the pop star in custard at the Pride of Britain Awards on Monday.
He was named Young Fundraiser of the Year after donating nearly £100,000 to Royal Manchester Children's Hospital.
"We were so proud of him," she said, "I was in floods of tears." Simon Cowell donated £10,000 to Cameron's charity for his exploits.
The 12-year-old, who has a life-threatening blood disorder, said: "I wasn't nervous, I just threw it straight at her.
"She took it really well because it's for a good cause.
"I was shocked by how much money it raised. I was really proud and happy because it's a really good award."
Ms Cole, who was presenting the award with her band Girls Aloud, volunteered after the show's host Carol Vorderman revealed that Cameron's next fundraising scheme involved custard pies.
Baked bean bath
Ms Small, who has been helping her son to fundraise since he was just four, said it had been "an amazing night".
"He just shows that you can do things to help people even if you're not well yourself.
"He goes to school like any other kid. He doesn't really tell anybody about his condition and he doesn't really boast about what he has achieved.
"We are just so proud."
Years of treatment for the life-threatening condition has left him with diabetes and he requires four injections a day on top of his medication for his blood disorder.
This does not interfere with his charity work. He has sat in a bath of baked beans, led a mass sandcastle build and organised various raffles and concerts.
Ms Vorderman praised him, saying he was "fantastic" but "cheeky, I'll tell you that".