In a recent interview, Harry and Niall played a game of "Yes/No," where they were asked about whether they've worn dirty underwear for more than three days. They both answered no, but when told the 5SOS boys had admitted to the laundry sin, the 1D guys called them "dirty boys."
In a new interview with Nova FM, Michael Clifford fired back: "That is a complete lie! When you are on tour there is no way that you can like..."
Calum Hood joined in, saying, "I know for a fact Niall has done that!"
Luke Hemmings added, "He's like 'Irish people are so clean! Look how clean we are!'"
Michael joked, "Niall has gone two weeks! Niall sh*ts his pants!"
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Gallery | Best of One Direction Memes