Katharine McPhee Returns to 'American Idol' Stage for Duet with Contestant Willie Spence - Watch!

Katharine McPhee is back on the American Idol stage!

The 37-year-old actress and singer returned for the Celebrity Duet round of singing competition show on Sunday night (April 4).

Katharine teamed up contestant Willie Spence for a duet of Celine Dion and Andrea Bocelli‘s song “The Prayer,” and he practically upstaged her!

“You do no wrong in my eyes,” judge Luke Bryan said to the 21-year-old caretaker after the performance.

Katy Perry added, “It was goosebumps central, everywhere.”

Ahead of the performance, Willie dedicated the song to his grandfather, who recently died.

“This has really been one of the hardest times of my life,” Willie said. “My grandfather still is my hero to this day, and I just know he’s watching and smiling down.”

For his solo performance earlier in the show, Willie performed a cover of Bette Midler’s “Wind Beneath My Wings.

If you forgot, Katharine competed on season five of American Idol where she finished as the runner-up to Taylor Hicks.

Katharine recently showed off her post-baby bod in a bikini one month after welcoming son Rennie with husband David Foster.