American boyband Backstreet Boys have opened up about some of their most memorable bad fan experiences.

Member Kevin Richardson told Dazed Digital that the worst thing about performing live is when members of the audience throw things in the direction of the stage as it can interfere with the show:

"We were in the Swiss Alps performing and we were on an early promo tour. It was either Switzerland or Austria and some guys were in the back heckling us and throwing snowballs and one of them hit A.J. in the mouth, and it had a rock in it and busted his lip." He added: "We had tons of bras and panties thrown on stage and stuffed animals and it's frustrating sometimes."

"We've slipped and fell because of the bras and the panties and the stuffed animals on stage because back in the day we used to do some crazy dance routines, some pretty crazy stuff."

Richardson also confessed that fellow member Brian Littrell once had to deal with a fan climbing onto the stage while he was singing: "There was one time Brian was singing, and he had his eyes closed and he heard all this screaming and commotion and thought, 'Wow, the crowd are really getting into my performance,' and he opened his eyes and there was a girl standing right in front of them and she had got up onstage and was right in his face and she just grabbed him and would not let go. That was an interesting story."