J.C. Chasez is a famous pop musician.
History
Early life
He began a long-term relationship with Rachel, an old girlfriend of Shaggy Rogers, after she had won an online dating competition, Win a date with J.C..
What's New, Scooby-Doo?
Season three
J.C. unmasked
He formed the "evil Mystery Inc." (Chasez dressed up in an "evil" Scooby-Doo mask and costume) and tried to frame and discredit the originals, after he grew jealous from constantly hearing the 'enormous feats' Shaggy had accomplished from Rachel. (A Scooby-Doo Valentine)