Aussie band 5 Seconds Of Summer stopped for a chat with Y100 after the recent Jingle Ball and opened up about the one things fans might do at their gigs that they really don't like. 

Luke Hemmings and Michael Clifford both agreed that spending an entire concert looking at your phone is "the worst" and they really dislike when fans in the audience choose to do that:

"I think if you're a real fan now... we've kind of expressed we don't like it - if you're on your phone at a concert... that's the worst. I don't like it in any circumstance, even if it's not our show. I hate when people are on their phones the whole time. Maybe I'll take, like, a picture but if you're on your phone filming the whole concert... f**k."

Drummer Ashton Irwin then revealed the story behind his nicely-painted nails, adding: "I went into a bar, they said they were doing it for free if you got a cocktail... the woman looked sad because she hadn't done any all night so she did the whole shazam!"

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Watch a recent interview with 5SOS here: