"So Help Me Girl" is a song written by Howard Perdew and Andy Spooner, and recorded by American country music singer Joe Diffie. It was released in January 1995 as the third single from his fourth studio album, Third Rock from the Sun (1994). The song reached number two on the Billboard Hot Country Singles & Tracks chart, where it debuted at number 59 for the week of February 4, 1995, and number 84 on the Billboard Hot 100.