Darren Criss first burst onto the Glee scene with an unforgettable cover of Katy Perry’s “Teenage Dream.” On this week’s episode, Criss will reprise the song that made him a superstar—but with quite a different approach from his initial performance. During a surprise visit to New York, Blaine (Criss) dedicates an emotional rendition of the song to Kurt (Chris Colfer) at a local piano bar. But gasp! When Blaine sings the tune at a slower pace its sunshine-y lyrics suddenly take on a whole new, troubling meaning. Is there trouble ahead for Kurt and Blaine? Scan the clip below for clues!