TGIF FEATURE: There's a new Fab 4; youngest string quartet ever

AMAZING! These four youngsters have been playing with each since they were four. What is that? All of four years? 

The musical prodigies are from the Joyous Music School in Long Island, New York, this is perhaps the youngest string quartet ever. Above, they perform Katy Perry’s Firework. I dig the viola player's fedora. Too cool. Eight-year old cellist Justin Yu appeared on the Ellen DeGeneres Show. Watch out Yo Yo Ma.

Wait for the big finish!