About Catchy Song (feat. T-Pain & That Girl Lay Lay)

"Catchy Song" is the main theme song to the 2019 Warner Bros. Pictures film The Lego Movie 2: The Second Part. It is written by Jon Lajoie, produced by Dillon Francis, and sung by T-Pain and Alaya High (the latter credited on the soundtrack release as her stage name That Girl Lay Lay). The song is notable for its repeated lyric, "This song's gonna get stuck inside your... (3x) ...head!.

Following the same attempt to create an earworm of a song with "Everything Is Awesome" from The Lego Movie, the producers of the film created the similar song for the sequel, which principally features the repeated phrase "This song's gonna get stuck inside your head!" for most of the song. According to Lajoie, he found that "Everything is Awesome" was "annoyingly catchy", and the only way that they could outdo that was "Dial the 'annoying' up to 11!".