Masterchef contestant reveals what Katy Perry was really like on set

Masterchef Australia contestant Reece Hignell has revealed what Katy Perry was really like on set while filming an episode of the hit cooking show. This comes as 942,000 people tuned in to watch the final across five capital cities last night, which was filmed in March.

While many of the contestants were excited at the prospect of Katy Perry being on the show, the most excited was arguably Reece who told news.com.au that it came as a complete surprise.

"The judges said to us the day before, 'If you ever want to get into an immunity challenge, tomorrow is the one you want to be in,'" Reece said. "So we expected something good, but we thought it would be something along the lines of we'd all win immunity.

"But no, it was the best twist ever," he said. "We lost our minds completely. It just didn't seem like something that would ever happen."

Per the news outlet, viewers loved Katy's performance on the show, describing it as "completely chaotic".

"She walked in and did not leave," he said. "The whole time she was there, she was on. She didn’t leave the floor once.

"She spent the whole time walking around trolling us, but it was the most endearing thing," the contestant said. "She was like, 'Oh, is this cake going to cook in time?' I was like, 'Katy, it's got half an hour to cook,' and she said, 'Hmm, cakes take longer than half an hour.' I was like, 'Leave me alone!'" Reece laughed.

However, while Reece might have been overwhelmed with excited by Katy's appearance, his fellow contestant Reynold didn't bat an eyelid.

"Did you see Reynold?" Reece said to news.com.au. "His reaction was like, 'Meh'. I was like, 'Reynold, it's Katy Perry!'

"After the challenge when we were walking out and I said, 'What are you doing? Reynold, why did you not react?' He said he was too focused on making his dessert. I was surprised that he was unfazed but he's just so focused."

Once filming was over, Reece revealed that Katy stayed around to chat with the contestants.

"She stuck around briefly afterward and we did a few publicity photos," he said.

"I had a chat [with] her for about five minutes. We were just chatting about the competition and she was in disbelief that we have to walk in every day and cook without a recipe.

"She was shocked that we had to come up with all of our ideas on the spot, so that was really cool that she gave us a bit of respect," Reece said.