Question: Who successfully "crossed over" to pop music and was one of the most influential, successful and acclaimed vocalists of the 20th century, who released an EP on April 20, 1962 ?
Sentence (from "Michigan J. Frog"): In this cartoon, partly inspired by a 1944 Cary Grant film entitled "Once Upon a Time", Michigan is a male frog who wears a top hat, carries a cane, sings pop music, ragtime, Tin Pan Alley hits, and other songs from the late 19th and early 20th century while dancing and performing acrobatics in the style of early 20th century vaudeville.
Relevant evidence: No