Katy Perry kissed and groped by fan she invited on stage

Katy Perry got more than she bargained for when she invited one fan up on stage during her performance in Brazil at the weekend.

The female 'Katycat' - Katy's name for her fans - immediately began kissing the singer's neck during the Rock In Rio festival.

And at one point the Roar hit maker tells the crowd: "That's my boob."

She then goes on to say: "We need some water. I think she's rolling."

But always the professional, Katy kept her cool, even taking a selfie with the fan on stage and asking her to teach her a few words in Portuguese.