This song was co-written by Atlanta hard rockers Injected. David Cook explained to Entertainment Weekly: "I'm a big fan of this band Injected, out of Atlanta. We called them up and said, can we have a run at this song and see what happens? What they sent us was a demo version, so we took the idea and ran with it. It's heavy, but still a strong melody."
"Thinking About You" was the ninth track from Calvin Harris' 18 Months album to enter the UK singles Top 10. No other artist has obtained so many hits from one LP - Michael Jackson was the previous record holder with seven Top 10 tunes from both his Bad and Dangerous sets.