Movies that weren’t musicals but turned into them – Legally Blonde, Mean Girls, and now add the “Vacation” films to the list. Yup, The National Lampoon’s Vacation aka Chevy Chase favorties will be turned into a musical… “Broadway Vacation.” Producers Ken Davenport and Kurt Deutsch said in a press release yesterday, “If audiences thought their cinematic misadventures were funny, wait till Clark and his family get to Times Square.”