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Madonna flirts with Justin Bieber hard-core on Ellen (VIDEO)

A celebrity gossip junky, Caroline Goddard has been writing entertainment news for longer than the world has known Kim Kardashian's name. Follow her on Twitter at @GoddardCaroline.

We're pretty sure Justin Bieber just admitted that he dated both Kylie and Kendall Jenner

Madonna and Justin Bieber played an enlightening game of Never Have I Ever with Ellen DeGeneres today and the results are disturbing.

The creepiness started as Ellen handed out paddles that said "I have" and "I have never" on either side, to which Madonna commented, "Can we spank each other with these?"

She later cuddled up to the Biebs, proclaiming, "I feel like I'm getting to know my new boyfriend."

More: Justin Bieber uses the worst accent ever to prank Belieber (VIDEO)

There was lots of flirty banter, in fact — watch the video to see for yourself and find out what naughty behavior the Biebs has been up to.

More: Justin Bieber's roast was so rough, he wanted to cry (VIDEO)

Let's rewind there for a sec. Bieber just admitted to dating siblings (for the record, so did both Madonna and Ellen) and now we can't stop speculating about who they might be. The mind obviously jumps immediately to… Kendall and Kylie Jenner!

Bieber's Instagram is littered with pics of himself having a grand time with each sister and he has been rumored to be more than friends with both of them. We highly doubt he has dated the sisters of Selena Gomez, who were born in 2013 and 2014.

Ellen has been giving Bieber a platform on his quest to clean up his image, but we're not sure this is helping.

Tell us: What other siblings could Justin Bieber have dated?

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