He started asking celebs at the Brits on Monday night if they'd team up to record Stand Up As People, a song Lee wrote in 2002.
A spokesperson told CBBC Newsround's website: "It's a very beautiful song, very slow."
'Nothing definite'
Lee also told BBC Radio Five Live: "We want people like Pink, we're trying to get Sugababes and Kylie."
"All the money will hopefully go to charities like Warchild, for kids who have been affected by war."
Justin and Kylie partied with Blue at a celeb-studded bash after the Brits.
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All the Brits goss!
How true Blue r u?
I saw Lee get his top off!
