"Don't Mess with Bill" is a song recorded by the Marvelettes for Motown Records' Tamla label. Written and produced by Smokey Robinson, "Don't Mess with Bill" features a lead vocal by Wanda Young. The single peaked at number seven on the Billboard Hot 100 in February 1966, and at number three on Billboard's R&B singles chart. "Don't Mess with Bill" was the Marvelettes' final top 10 single.