 The song also became his first number one hit on the U.S. "Billboard" Hot Country Songs chart in September 2003.Bentley co-wrote "What Was I Thinkin'" with his record producer, Brett Beavers, and Deric Ruttan.The song is an up-tempo in which he recalls escaping one night with a "beauty from south Alabama," named Becky while the narrator spends the song constantly questioning "what was I thinkin'", being mesmerized by Becky into committing all manner of foolish activities.