Talk show host Jimmy Fallon is used to welcoming movie stars, famous athletes and top musicians to his comfy couch at Late Night With Jimmy Fallon, but on August 5 Fallon got to know a few out-of-this-world guests. The intergalactic singing group Voca People, who are currently showing off their a cappella abilities at off-Broadway's Westside Theatre, stopped by the show to perform a variety of songs including "In the Mood," "My Girl" and more. They even humorously tapped into Fallon's brain to uncover his favorite music. Take a look below!