Carly Rae Jepsen has been ordered to pay damages for copyright infringement.
The Call Me Maybe singer and Owl City's Adam Young, and two additional writers, Matt Thiessen and Brian Lee, were hit with a lawsuit in 2012 claiming Carly's Top 10 hit Good Time was a copy of another song.
Allyson Nichole Burnett, a singer-songwriter based in Alabama, claimed Young, Thiessen and Lee copied a "unique vocal motif" from her 2010 song Ah, It's A Love Song for Good Time, which was released by Owl City and Carly Rae.
The judge ordered BMI - the company that collects the royalties on behalf of songwriters - to pay 804,156 dollars (£488,000) in compensation to the defendant.
Burnett's lawsuit alleged the two songs feature "identical pitch sequence... melodic contour... rhythmic construction... [and] timbre," and goes on to state both tunes share "a catchy pop vibe that both draws people in and sticks in people's heads".
Burnett also claimed she suffered "emotional and psychological damage" as a result of the alleged copyright violation, and said fans have begun asking her why she copied Carly Rae and Owl City's hit.
Jepsen - who last year supported fellow Canadian singer Justin Bieber on tour - is currently in rehearsals to play the lead in musical Cinderella on Broadway.