sentences:  MGM's first foray into animation was the "Flip the Frog" cartoon series, starring an anthropomorphic talking and singing frog.The series was produced independently for Celebrity Pictures by Ub Iwerks, formerly the head animator at the Disney studio.Celebrity Pictures' Pat Powers had hired Iwerks away from Disney with the promise of giving Iwerks his own studio, and was able to secure a distribution deal with MGM for the "Flip the Frog" cartoons.