Dolores "La La" Brooks is the only Crystal to perform on this song. Spector recorded the group's first recordings in New York City, where they were from. When he relocated to Los Angeles, he had a group called The Blossoms (with Darlene Love singing lead) record the songs "He's A Rebel
" and "He's Sure the Boy I Love," which he issued as The Crystals.
On all subsequent Crystals recordings, Spector flew Brooks from New York to Los Angeles to perform the lead vocals, but the other Crystals never made the trip, as Spector preferred to use local backup singers.
This was also around the time when the group shrunk from five members to four, losing Mary Thomas, who left to get married.