Singer Katy Perry shows her white pant while performing on One’s Big Weekend on Saturday night.

Singer Katy Perry flashed her knickers as she headlined Radio One’s Big Weekend on Saturday night.

The Bon Appetit singer took to the stage in Hull in a shimmering mini dress and matching jacket, but as she squatted down during her performance, she revealed her white underwear to the crowd.

Katy didn’t seem fazed though, giving an energetic performance as she danced and got the crowd going as she belted her way through some of her biggest hits.

The 32-year-old’s headline set came after she performed a tiny gig at ­London pub The Water Rats on Thursday.

The pub was the first UK venue she played nine years ago and she returned to launch Roman Kemp’s Capital Breakfast Show.

n stage, Katy didn’t hold back, as The Sun’s Bizarre column exclusively revealed how she confessed her sex life has never been ­better, despite splitting from Orlando Bloom in March.

Katy said: “Let me tell you, if you’re not having great sex now, in your thirties it’s going to be amazing.

“I can’t speak to those of you in your forties but I bet it’s great.

“And it’s fun and it’s consensual and it’s intimate, it’s so much fun if it’s consensual and beautiful.