The Butterflys were a Brooklyn, NY based group of the Red Bird label. They have often been misidentified as a studio group, containing Ellie Greenwich. The lead singer is Paulette Holland, accompanied by Mary Thomas and Myrna Giraud, formerly of the Crystals and Carmen Santiago. The co-writers of "I Wonder" are Jeff Barry, Ellie Greenwich and Phil Spector. Spector previously recorded two versions of this song, one by The Ronettes and the other by The Crystals. Read more on Last.fm