West, making his first appearance on the top-rated Fox series, will perform his hit song "Heartless" from his latest album "808s & Heartbreak."
Clarkson, the original "American Idol," will sing her chart-topper "My Life Would Suck Without You," off her new album that drops Tuesday.
The show - a ratings juggernaut since it debuted in 2002 - has attracted numerous top artists as mentors and performers in recent seasons. Among them: Mariah Carey, Prince, Gwen Stefani, Dolly Parton and Jennifer Lopez.
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