Taylor Swift, appearing to pay tribute to her boyfriend Travis Kelce, included  "The Alchemy" as a surprise addition to her setlist during her Paris show on Sunday. The Grammy-winning artist blended the song, which fans speculate is about her romance with the NFL star, with her hit "Treacherous" as Kelce watched from the crowd alongside Gigi Hadid and Bradley Cooper. Let's watch the video to see Kelce's reaction...