Season 1 winner, 28, will perform "Do not want you to stay" with country singer Jason Aldean Thursday's results show. Rihanna will also be on stage on Thursday.
Clarkson recently announced via Facebook his fifth studio album will be released in September. She last appeared on Idol at the end of last season for a farewell performance of the judge Simon Cowell.
This week, the rest Idol Top 8 will perform songs from movies.
Are you excited to see Clarkson back on Idol?