When contacted by news.com.au, a Seven spokesperson confirmed the pop star's segment was pre-recorded last week:
"Katy Perry has recorded her portions of the show. We let fans know that last week, by inviting them to come down and see her during her appearance."
Meanwhile, 'King' Judah Kelly finally received his crown after winning this year's season of The Voice.
The 22-year-old, with the goose-bump raising voice, had been tipped as the favourite to take the 2017 title - giving coach Delta Goodrem back-to-back victories in the Nine talent series.
After a stunning duet with Goodrem of Beyonce's I Was There and a solo performance of Climb Every Mountain, the Queensland former back-up singer claimed the season from runner-up Hoseah Partsch.
"I'm so excited," Kelly told News Corp. "I've just loved every moment and I'm just really glad there are people supporting me."
His winner's single is Count On Me.
Banking the $100,000 prize money and contract with Universal Music, Kelly's hope now is to harness his success from The Voice by cracking the music industry as a solo artist.
While he may not have conventional good looks or boy-band chiselled abs, he's confident it won't hold him back.
"The show is happy to work with you," said Kelly. "(In terms of being commercial) I'm creating music that I love. And if I'm loving it then people listening will love it, too. The audience knows if you don't love it."
His blind audition of Chris Stapleton's Tennessee Whiskey won him an instant fan following, which only grew with his Knockout round performance of Adele's When We Were Young and Battles song of Miley Cyrus' hit The Climb.
His semi-finals version of Leonard Cohen's Hallelujah peaked last week at number three on the iTunes charts.
"I like to keep things very simple and basic," Kelly said.
"The goal from here is just to make a living from music. If it becomes fame and millions of dollars then that's a cool bonus."
