During Sunday night’s emotional “American Idol” finale, viewers got a dose of cheer from none other than Michael Bublé

The Canadian singer appeared during the show, singing a take on the classic song “Smile”, first recorded by Nat King Col in 1954.

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After singing the the opening verse, Bublé welcomed Top 7 finalist Christian Guardino to make it a duet.

The 21-year-old singer immediately earned cheers from the crowd, perfectly complementing Bublé’s vocals for what ended up being a soaring, uplifting moment.

Singing the duet together was a culmination of sorts, after Bublé had previously surprised Guardino on the May 8th episode of “American Idol”, inviting him to join forces for a duet in the finale.

“Are you kidding me? Are you serious?” Guardino said at the time, before accepting the offer wholeheartedly.

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Despite not making it into the Top 3, Guardino has already struck out on his own, releasing the single “Higher” earlier this month.