The lyrics for the film version are a shortened, punchy take on the original track:
The track by Kimya Dawson is a staple of the Juno (2007) soundtrack, known for its quirky, lo-fi folk sound. My Rollercoaster [Juno Film Version]
In the film, the song plays during the scene where after informing Paulie Bleeker that she is pregnant with his child. Full Lyrics The lyrics for the film version are a