The Soggy Bottom Boys (O Brother, Where Art Thou?)
California Dreams
100% Natural Good Time Family Band Solution (Arrested Development)
The Wonders
The Beets (Doug)
Stillwater (Almost Famous)
The Kelly Affair (Beyond the Valley of the Dolls)
Deathklok (Metalocalypse)
Fingerbang and Faith +1 (South Park)
The Be Sharps (The Simpson)
Frozen Embryos (My So-Called Life)
Hey That’s My Bike (Reality Bites)
Guitarmageddon (Home Movies)
Jem and the Holograms
Jesse and the Rippers (Full House)
Spinal Tap (This is Spinal Tap)
Sexual Chocolate (Coming to America)
Dr. Teeth and the Electric Mayhem (The Muppet Show)
The Partridge Family
Figrin Dan and the Modal Nodes (The Catina Band from Star Wars)
Scrantonicity (The Office)
Sex Bob-Omb (Scott Pilgrim)
CB4
The Zit Remedy (Degrassi)
Josie and the Pussy Cats
The Zack Attack (Saved by the Bell)
WayNoWay (Friends)
Dethclock (Not Deathclock) is a real band with actual albums... False info somewhere.
#16 spinal tap has a fictional back story and actors portraying the musicians, but really IS a band... when they want to be. they released three albums and do occasionally tour.
George Clooney (Everett) was going to sing the song "Man of Constant Sorrow" for the film but it turned out that he was rather awful, so he ended up lip-synching the songs instead. He said "I'm not my aunt [referring to the late singer/actress Rosemary Clooney