'Louie Louie' Singer Dead at 71

4/28/2015 3:32 PM PDT

Jack Ely, the lead singer of the group the Kingsmen which recorded the hit "Louie Louie" -- a song that prompted an FBI investigation -- has died.

Ely's controversial song was a monster hit in 1963. He almost slurred some of the words, making them very difficult to understand and subject to considerable interpretation. 

The FBI launched a probe to determine if some of the lyrics were obscene.  Many junior high school students were buzzing that one of the lyrics included the phrase, "f*** you girl, oh, all the way," and "I felt a boner in her hair."

Ely left the group shortly after the song was released and ended up training horses in Oregon. 

He ws 71. 

RIP