Her hit song Hot N Cold has featured on all 11 seasons of MasterChef Australia.
And while Katy Perry was in Melbourne last week, the pop star herself managed to squeeze some time into her busy schedule for a visit to the MasterChef kitchen.
Contestants competing in the upcoming MasterChef Australia โ Back To Win series were left shocked by the Swish Swish singerโs arrival and were absolutely losing it when she turned up.
Acting as guest judge during an immunity challenge, Katy โ who is expecting her first child with actor Orlando Bloom โ had the competitors in stitches as she reminded them they were cooking for two.
โMama was hungry,โ she joked.

Katy Perry made a surprise appearance on MasterChef (pictured with judges Andy Allen, Melissa Leong and Jock Zonfrillo)
(Image: Network Ten)
โMama was hungry,โ the pregnant pop star joked while filming scenes for the show.
(Image: Network Ten)Katy also revealed insights into her pregnancy journey so far, including the foods sheโs been craving since falling pregnant.
The singer said sheโs found herself wanting more exotic and spicy food now that sheโs expecting โ and even admitted to carrying tobasco sauce in her purse.
MasterChef Australia judge Melissa Leong described Katyโs visit as unforgettable.
โWhat makes the MasterChef Australia kitchen so special? The fact that ANYTHING can happen!โ she said.
โCue Katy Perry serving us pop star realness and a dose of honest food-loving opinion as guest judge. A day that wonโt be forgotten soon, thatโs for sure.โ
WATCH: Katy Perry is expecting her first child with Orlando Bloom. Story continues belowโฆ

While Down Under, Katy admitted she wasnโt yet sold on Vegemite.
(Image: Getty)And the California Girls hitmaker seemed to have enjoyed herself just as much, with Katy raving about the experience at the end of the episode.
Katy claimed being a MasterChef guest judge was โone of the favourite things sheโs ever doneโ.
Katyโs special appearance can be seen in the upcoming Back to Win 12th season, coming soon to Channel 10.