Jack Nitzsche was a prolific American musician, arranger, songwriter, and record producer known for his significant contributions to popular music in the 20th century. His distinctive style combined orchestral arrangements with rock and roll, shaping the sound of numerous influential artists such as Phil Spector and The Rolling Stones. Nitzsche is especially recognized for co-writing "Needles and Pins" and creating the iconic orchestral arrangement for "You've Lost That Lovin' Feelin'". His work has left a lasting impact on the music industry, demonstrating the potential of combining diverse musical genres.