In an exclusive interview with E! News, Tomlinson admits he and the 1D guys even love to prank each other while performing during their concert tour.
"During a concert, we'll always every now and then change a few words," Tomlinson told E! News during our One Direction Week sit-down with him. "I can't think of any off the top of my head. But something stupid and random."
"Yeah, just something for the fun," he added.
Meanwhile, Tomlinson admits it's sometimes hard for his longtime girlfriend Eleanor Calder to deal with his tremendous fame and the obsessive hoards of female fans that come with it. "Yeah, I suppose it is tough to deal with," he dished, adding, "but you know, she's a great girl."
Yesterday, Tomlinson's single pal Harry Styles revealed how he differentiates between girls who are sincere and girls who like him just for the fame.
"I think you just know," Harry said. "It's one of them things where if you meet someone who likes you just because it's you and not because, you know, you have stuff."
Be sure to tune in to E! News at 7 p.m. and 11:30 p.m. tonight for more of our exclusive chat with Tomlinson as E! News' One Direction Week continues!