Timbaland is so impressed with fellow music stars Gwen Stefani, Akon and Linkin Park, he has asked them to contribute to his new album. The U.S. superproducer is returning to the studio to record the follow-up to his hit record Shock Value - and hopes this will be his most successful yet. The 36-year-old is also producing the debut album of Keri Hilson, who featured on his hit track The Way I Are.