Trolls Australian Premiere - ArrivalsThe performers who gave voice to the year's Best Original Song Academy Award nominees are set to appear at the ceremony — except for the two leads of Oscars frontrunner "La La Land."

Emma Stone and Ryan Gosling will not perform "City of Stars" and "Audition (The Fools Who Dream)." Instead, fellow cast member John Legend will step in to sing both songs.

Stone and Gosling are nominated for Best Actress and Best Actor, so it's not a huge surprise that they won't bring their respective ballads to life. Meanwhile, Justin Timberlake will sing "Can't Stop the Feeling!," the feel-good pop number from the animated movie "Trolls." Sting will croon "The Empty Chair" from documentary "Jim: The James Foley Story." And Auli'i Cravalho will perform "How Far I'll Go" from "Moana," joined by Lin-Manuel Miranda, who penned the tune.

"We're thrilled to welcome these world-class artists to the Oscars," producers Michael De Luca and Jennifer Todd said in a statement. "These performances will not only celebrate the five extraordinary nominated original songs, but also the integral part music plays in movies."

The Oscars ceremony airs Feb. 26 at 7 p.m. on ABC.

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