When Jon Biel wanted to enlist some help for a music charity for underprivileged New York children, he knew just where to turn: daughter Jessica's boyfriend: Justin Timberlake.
Through Jon Biel, the pop star saw a newspaper story about Ten O'Clock Classics, which provides lessons and instruments, and agreed to autograph a baby grand piano to be sold at a Sept. 29 auction.
"He cares about music education and wants to make sure these kids can continue to have music lessons," says Ronen Segev, founder of the non-profit, which also received a signed piano from Billy Joel and is working with other celebrities. "They listen to his music and they connect with him. He is the inspiration for their love of music."
Justin Timberlake in Sync with Kids' Charity

Jessica Biel and Justin Timberlake
Peter Kramer/AP
09/28/2009 AT 08:25 PM EDT