Herbie Hancock wields a wicked keytar at his 70th birthday concert titled “Seven Decades -- The Birthday Celebration” at the Hollywood Bowl on Wednesday, Sept. 1, 2010. (Genaro Molina / Los Angeles Times)
Hancock at the piano during his birthday celebration at the Hollywood Bowl on Wednesday night. (Genaro Molina / Los Angeles Times)
Herbie Hancock is all smiles while performing with singer India.Arie, one of several guest stars at the birthday show. (Genaro Molina / Los Angeles Times)
Hancock and saxophonist extraordinaire Wayne Shorter join forces. Shorter was among a number of stellar musicians backing Hancock on Wednesday night. (Genaro Molina / Los Angeles Times)
Latin sensation Juanes belts out a song with backing from Hancock and Co. (Genaro Molina / Los Angeles Times)
Colombian pop singer Juanes honors Herbie Hancock at the Hollywood Bowl birthday celebration. (Genaro Molina/Los Angeles Times)
Hancock sings along with Susan Tedeschi at his 70th birthday concert at the Hollywood Bowl on Sept. 1, 2010. (Genaro Molina/Los Angeles Times)
Members of the Debbie Allen Dance Academy perform in front of Herbie Hancock and his band during his 70th birthday concert titled, “Seven Decades - The Birthday Celebration” at the Hollywood Bowl. (Genaro Molina / Los Angeles Times)
Herbie Hancock acknowledges the cheers from the crowd at the end of the first half of his performance focusing on traditional jazz featuring Terence Blanchard and Wayne Shorter. (Genaro Molina / Los Angeles Times)
