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.