Singer Rita Ora has apologized to fans after accidentally flashing her breast during a performance in London on Wednesday night.

The Shine Ya Light star raced between two shows in the British capital on the back of a motorbike to perform as part of the Red Bull Culture Clash event.

She took to the stage at Wembley Arena in white biker leathers with the zip pulled down to expose her cleavage, but her energetic dance routine resulted in an embarrassing wardrobe malfunction, and she exposed her breast to the audience.

The star has now told fans she feels mortified over the nipple slip, writing in a post on Twitter.com, "Yes. It's true. I got straight off a moterbike from O2 (Arena) to Wembley I didn't have time to change and then all of a sudden the zip got lower... And lower. I rushed on stage and pop! It happened, f**k! Sorry guys. (How embarrassing) apologized!"

"Despite that, amazing show!"