is a song by Canadian indie pop duo Tegan and Sara featuring American comedy trio the Lonely Island.

The theme song to the 2014 Warner Bros. Pictures film The Lego Movie, it was written by Shawn Patterson,[1] Joshua Bartholomew, Lisa Harriton,[2][3] and the Lonely Island.

[6] The music video features Lego versions of Tegan and Sara as well as the Lonely Island's Akiva Schaffer, Andy Samberg and Jorma Taccone.

Tegan and Sara performed the song with the Lonely Island, musician and singer Mark Mothersbaugh of Devo (wearing a LEGO version of the Devo energy dome), DJ and drummer Questlove of The Roots, and actor Will Arnett, dressed as Batman, wearing the costume originally worn by Val Kilmer in the 1995 film Batman Forever.

[15] In the film, Arnett provides the voice of Batman and sings the mocking heavy metal composition "Untitled Self Portrait", an excerpt of which was incorporated into the performance of "Everything Is Awesome" at the Academy Awards.