Complex sentence: He plays bass in A Perfect Circle, Puscifer, Ashes Divide and recently 30 Seconds to Mars and also sings backup vocals in all of these bands and plays some keyboard and guitar for Puscifer.
Split into simpler sentences: He plays bass in A Perfect Circle, Puscifer, Ashes Divide and recently 30 Seconds to Mars. He also sings backup vocals in all of these bands and plays some keyboard and guitar for Puscifer.