The 18-year-old Irish cutie has confessed that he was left red-faced when link, 20, whipped down his trousers in front of fan - not they they were complaining.
'Oh they were delighted. I had nice Calvin Kleins on, but I was so embarrassed,' says Niall.
No need to be so shy, Niall. We think te should follow in Harry's footsteps and embrace nudity...
