Martell overdubbed his guitar and vocals later. Percussion and vocals were overdubbed at Germano Studios. Carey's lead vocals blend into choruses of overdubbed Mariah's cooing overlapping phrases. Harrison also overdubbed occasional interjections on acoustic guitar. Vocals and guitars were overdubbed one or two days later. The band played together live at CBS; the lead and backup vocals were overdubbed. Two harmonium parts were overdubbed, using EMI's Mannborg harmonium. Once an instrumental track was completed, vocals would then be overdubbed by the group. A glockenspiel part was also overdubbed over the coda. On October 12, 1962, Waters overdubbed his vocals. Leiber and Stoller overdubbed a bassline and percussion, and released it. The electric guitar opening and riffs were overdubbed and played by Dennis Linde himself. Reynolds then overdubbed additional acoustic and electric guitar parts. During the same session, McCartney overdubbed bass guitar. Stefani's voice is overdubbed again when she sings the chorus twice.