Fall Out Boy is an American rock band that debuted in the special four-part episode of Teen Titans Go!.
- Patrick Stump (lead vocalist, rhythm guitarist)
- Pete Wentz (bass guitarist)
- Joe Trohman (lead guitarist)
- Andy Hurley (drummer)
- Patrick: Patrick has light skin and light brown hair. He wears glasses, a hat, a blue sweater and dark pants.
- Joe: Joe has light skin and thick dark wavy brown hair. He wears a purple shirt and purple pants. He also has tattoos visibly covering both his arms.
- Pete: Pete has light skin and short black hair. He wears a denim jacket with a black shirt underneath and jeans.
- Andy: Andy has light skin, short redish-brown hair and a brown beard and mustache. He wears black sunglasses, a dark black-purplish shirt and dark pants. Like Joe, he as tattoos visibly covering both his arms.
- Chapter One: I Saw You Dance (debut)
- Chapter Three: Playing Hard to Get
- Chapter Four: The Night Begins to Shine
- Fall Out Boy is the third celebrity guest, with the first being LeBron James in "The Cruel Giggling Ghoul" and CeeLo Green in "Chapter One: I Saw You Dance".
- Michael Jackson does not count since he never spoke or had an episode centered around him.