Katy Perry surprised one very lucky fan during the Rock in Rio concert on Friday, plucking him from the crowd and planting a huge kiss on him!

The overwhelmed fan was invited on stage by Katy, after she told the audience that she would “like to try a Brazilian”.

The lucky dude copped a big sloppy kiss on the cheek from the “Firework” singer, before she asked him to return the favour.

We bet he'll never wash his face again!

Click through to watch the video.