Chris Stapleton and pop superstar Dua Lipa stunned the 2024 ACM Awards crowd with a surprise duet during Thursday night’s show. Lipa started the song solo before Stapleton strolled in from the right with guitar in hand. The duo worked through a new version of “Think I’m In Love With You” from the country singer’s 2023 album, Higher. Morgan Stapleton also joined for backing vocals. While the performance was smooth and soulful, it really was a last-minute effort. Stapleton and Lipa spoke with Bobby Bones backstage where they later admitted the performance came together in the past two days. Stap…