hidden inside history on Instagram: "The theme song for "What’s New, Scooby-Doo?" is widely considered one of the best cartoon openings of the 2000s, specifically because it wasn't treated like a typical "kids' song." It was performed by the French-Canadian pop-punk band Simple Plan, who were at the peak of their fame when the show debuted in 2002. follow @hiddeninsidehistory for more The band’s involvement went beyond just the theme song; they actually appeared as animated versions of themselve