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