If you thought you knew everything about One Direction, think again.

Niall Horan, Liam Payne, Harry Styles and Louis Tomlinson appeared on The Ellen DeGeneres Show Wednesday to promote their new album, Made in the A.M., and agreed to play a game of "Never Have I Ever." The rules were simple: Ellen DeGeneres would read a series of statements, and each of the boys would flip a paddle to reveal whether they had or hadn't done something.

DeGeneres asked them to confirm or deny the following:

• Never have I ever had someone write a song about me.

• Never have I ever gotten a tattoo that I regret.

• Never have I ever made out with someone double my age.

• Never have I ever used one of my bandmates' toothbrush without telling them.

• Never have I ever dated someone that another band member dated.

• Never have I ever gone skinny dipping in a hotel pool.

• Never have I ever hooked up with a fan.

• Never have I ever sent a naughty text to the wrong person.

• Never have I ever lied about who I was.

To find out who has and hasn't done those things, watch the video.

One Direction, The Ellen DeGeneres Show

Michael Rozman/Warner Bros.

Later, when the band performed its hit single, "Perfect," DeGeneres asked the boys of 1D to raise their hands if they're single. All four band members did, and fans went wild. "They are very excited for your loneliness," the talk show host joked.

DeGeneres had another surprise in store later on. "Ever since we announced One Direction was going to be on our show, we have gotten thousands of e-mails from their fans," she said. "I am going to read just one to you right now: 'Hi, Ellen. I watch your show every day. I can't believe you're having One Direction on there. My freaking favorite. Words can't describe what they mean to me. Not only are they the hottest guys, but their music really inspires me. I would do anything to meet them. Could you please make my dream come true? Sincerely, Rebel Wilson."

With tears streaming down her cheeks, Wilson—wearing a 1D T-shirt and holding a poster— walked down the stairs as the boy band's famous hit "What Makes You Beautiful" boomed from the speakers. After settling in next to Styles and catching her breath, she said, "This is crazy. I almost wore that same shirt."

Wilson said she'd been a fan of the band since "before they were legal."

Asked to pick her favorite song, the Australian actress joked, "I know you guys have a new song on the album called 'Olivia,' but I know that's really about me. So, that's like my new favorite." DeGeneres then asked, "So, why did you really come here?"

"Well, I am a massive fan. Legit. But you guys were saying before you're all single, and I'm single, and I'm also starring in a new movie that I know these guys are really going to love called How to Be Single. It comes out 12th of February," she told DeGeneres, Horan, Payne, Styles and Tomlinson. "So while these guys are dropping their album, I'm going to drop the new trailer for How to Be Single."

Watch the trailer for Wilson's movie with Dakota Johnson in the video above.

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