Niall Hall has joked that he hasn't washed his face since Katy Perry planted a kiss on him at the MTV VMAs last month.
The heartthrrob spoke to Australian radio hosts Kyle and Jackie O about the public smooch that he has treasured ever since, admitting:
"Katy Perry had lovely purple lipstick on and I still haven't washed it off to be fair!"
The 18-year-old also struck up a friendship with the 'Firework' singer on Twitter after the awards ceremony, where he and his One Direction bandmates clocked up three awards, but confessed he is also wary of the social networking site.
"We know not to overstep the mark online!" Niall explained. "It's common sense, you don't have to be a genius to figure it out."