Possibilities is the forty-fifth studio album by American jazz musician and pianist Herbie Hancock. The album features a variety of guest musicians such as John Mayer and Carlos Santana. It also earned him two Grammy Award nominations in 2006: "Best Pop Collaboration with Vocals" for "A Song for You" (shared with pop singer Christina Aguilera) and "Best Pop Instrumental Performance" for "Gelo Na Montanha" (shared with rock singer-guitarist Trey Anastasio).