Q: Context: "What Was I Thinkin"' is a song co-written and recorded by American country music artist Dierks Bentley. It was released in April 2003 as the first single from his self-titled debut album. The song became his first number one hit on the U.S. Billboard Hot Country Songs charts in September 2003.

Question: who sings the song what was i thinking?
Let's give stream of consciousness below
The relevant sentence in the passage is: "What Was I Thinkin"' is a song co-written and recorded by American country music artist Dierks Bentley. So the answer is American country music artist Dierks Bentley.