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Rihanna, George Clooney, Ellen DeGeneres

Michael Rozman/Warner Bros.

Who's more daring: George Clooney or Rihanna?

The answer might surprise some of The Ellen DeGeneres Show's viewers. The actor, 54, and the singer, 27, both appeared on Ellen DeGeneres' eponymous talk show Thursday. George was on hand to plug his film Hail, Caesar!, while Rihanna was there to promote her album, Anti, in addition to her upcoming tour. While there, Ellen asked her guests to play "Never Have I Ever."

Ellen, 58, handed George and Rihanna paddles with the words "I Have" and "I Haven't" written on either side. She then read a series of statements to get the dirt on the world famous stars:

• "Never have I ever texted a nude selfie."

• "Never have I ever swam naked in Lake Como.

• "Never have I ever been drunk before noon."

• "Never have I ever hooked up with someone over 50."

• "Never have I ever spanked a cat."

• "Never have I ever seen a rapper naked."

• "Never have I ever hooked up in the back of a car."

• "Never have I ever forgotten the name of the person I was fooling around with."

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

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

Ellen also asked both stars about their love lives on Thursday's show.

She teased George about not being invited to his star-studded wedding to Amal Clooney in 2014. "You were right at the cut off line," he joked. "We only had 105 people there." After she said the wedding looked "fun," George said it was because Amal is Lebanese. "Close to lesbian-ese," Ellen joked.

Later on, George opened up about how he proposed to Amal.

"It's funny—we were talking about that today. I think it was about six months until I actually thought I might pop the question, and it was one of those horrible moments we didn't talk about it. It wasn't like, 'Oh, maybe we should get married,' or anything. I plotted the whole thing out. I had the ring hidden behind her. I had music playing—my Aunt Rosemary's gonna sing 'Why Shouldn't I?' Everything was planned out and I've cooked dinner. And she comes in and she's just come back from London. Usually she'll dress up, and now she's like, 'Maybe we'll just order in. And I go, 'No, no, no. I've made dinner.' I've got it all set up, timed out, and the song is coming and she gets up to go wash the dishes—which she's never done. And I'm like, 'What are you doing?' And she comes back in. Finally I blew out the candle and I said, 'I think the lighter's in the box behind you.' And she reaches around and she pulls out the box and I've got just the ring sitting in there and she pulls it out and she looks at it and she's like, 'It's a ring.'" Like somebody had left it there some other time! I don't know. I'm doing all the moves you can do with my face."

"I got down on my knee and said, 'I couldn't imagine spending the rest of my life without you.' And she kept looking at the ring and she was looking at me and she was like, 'Oh, my God,'" he recalled. "And we now know because there was a playlist, so we know how long it actually took, and it was like 25 minutes. Finally I literally said, 'Look, I hope the answers yes, but I need an answer I'm 52 and I could throw out my hip pretty soon.' And she said, 'Oh, yes.'"

George added, "It worked out really well."

In a way, George always knew Amal was The One.

"It was one of those funny things," he said of the human rights lawyer. "From the minute we met we just hit it off. From the minute we met, we sort of felt like we were gonna be together."

Rihanna, meanwhile, is currently single. "It's not that I'm like, 'Oh, pro single! Yes! I hate men.' I just think that I just have so much on my plate that I can't even find the time to entertain a steady relationship or anything serious, or even a text," she told Ellen. "Right now it's just crazy."