American Idol’s top 20 will be duetting with some all-stars on Sunday.

Following Monday night’s episode, Katy Perry tweeted out the full roster of celebrity guests who will be performing with the contestants. They include Julia Michaels, Jason Mraz, Lukas Graham, Elle King and Shaggy.

Other guests include rock legend Pat Benatar, lovelytheband, country star Brett Young, singer/songwriter Ben Harper and Broadway star Cynthia Erivo.

American Idol airs Sunday at 8 p.m. ET on ABC.

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