Lionel, 69, opened up the finale with the Top 10 contestants. They all sang his hit number, “Dancing on the Ceiling.”
Season 8 runner-up Adam Lambert returned to sing his new single “New Eyes.” He also did a duet to “Bohemian Rhapsody” with finalist Dimitrius Graham.
Adam, 37, wasn’t the only seasoned alum to grace the stage. Carrie Underwood stopped by to perform her new single “Southbound.”
Katy, 34, hit the stage in a bright orange jumpsuit along with Daddy Yankee. The two performed the remix to “Con Calma.”
She also sported a purple sequined mermaid dress and a long blonde wig for her duet with one of the top 10 singers Jeremiah Lloyd Harmon. They sang her hit song, “Unconditionally.”
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Country stars dominated the guest performances during Idol. Dan + Shay sang their songs “All To Myself” and “Speechless” with top three finalist Madison VanDenburg.
Kane Brown took the stage with top 10 contestant Alyssa Raghu. He sang his hit, “Good As You” and was later joined by Alyssa for a duet to “Lost in the Middle of Nowhere.”
Luke, 42, also showed off his pipes with top 5 contestant Laci Kaye Booth. The Idol judge performed his song “Knockin’ Boots” and also did a duet to The Police’s popular number, “Every Breath You Take.”
Laine Hardy was ultimately crowned the winner after his stellar performance to “Home” by Marc Broussard. He also debuted his new single “Flame.”
Who do you think had the best performance of the night? Sound off in the comments below!