The Isley Brothers brought it out first.
Actually the Isley Brothers brought it out 2nd - the original version was by The Top Notes produced by Phil Spector! It is an absolutely awful version! Bert Berns took the song back from Spector and turned it into the classic track we know and love today. The Beatles' version was based on the Isley's version though.
If anyone would like to hear The Top Notes' version, please give me a shout.