Out of Sight (1966)

Teenage/secret agent/musical comedy about Big Daddy, who's been "driven mad by rock'n'roll," so he plans to sabotage a music fair with a bomb. Secret agent Homer comes to the rescue aided by his girlfriend Sandra along with Marvin. The sinister villains belong to the crime syndicate F.L.U.S.H. Featuring the musical groups The Turtles, Gary Lewis and the Playboys, The Astronauts, The Knickerbockers, and Freddie and the Dreamers.