After watching the movie, viewers couldn't help but wonder: Is that actually Rachel McAdams singing in the movie? Well, the actress actually did do her own singing, but only parts of it made it into the final cut. Swedish singer Molly Sandén, who also goes by My Marianne, took the lead in vocals.

Which songs does Rachel McAdams sing?

Sandén is an accomplished recording artist and pop star in her own right, having performed on the Junior Eurovision Song Contest in 2006. But there is one song that Rachel McAdams sings in full—as she states above, the scene in which Sigrit is composing the finale song “Husavik” is all her.

Are Will Ferrell and Rachel McAdams really singing?

While Ferrell has lent his own vocals to the Netflix film, McAdams has not, well not exactly. Swedish singer Molly Sandén provides Sigrid's singing voice in Eurovision Song Contest. ... According to Netflix, Sandén's vocals were mixed with McAdams's own voice for the tracks as their tones worked together.