Question: who sang the theme song for what's new scooby doo
Answer: What 's New , Scooby - Doo ? Genre Action / Adventure Mystery Sitcom Comedy Created by Joe Ruby Ken Spears Developed by Sander Schwartz Starring Frank Welker Casey Kasem Mindy Cohn Grey DeLisle Theme music composer Rich Dickerson Opening theme `` What 's New , Scooby - Doo ? '' performed by Simple Plan Country of origin United States Original language ( s ) English No.