The Bob Crewe Generation (B.C.G.) was a musical ensemble led by the prolific American songwriter and producer Bob Crewe. Active during the 1960s and 1970s, the group was known for its instrumental easy listening style, heavily incorporating elements of pop and jazz. B.C.G. is especially recognized for their hit "Music to Watch Girls By," which became emblematic of the "lounge" music era. Their significance lies in Crewe's innovative production techniques and their embodiment of the pop-oriented side of the easy listening movement.