So, Justin Bieber And Madonna Just Played A Super Dirty Game Of 'Never Have I Ever' On 'Ellen'

Watch the pop stars reveal their various hook-up secrets.

For the third day of "Madonna Week" on “The Ellen DeGeneres Show,” the reigning queen of pop was joined by Ellen’s new BFF, Justin Bieber.

How did they celebrate? By playing a round of our favorite, vaguely dirty sleepover game, “Never Have I Ever,” which sparked some super revealing confessions -- as well as a possible new relationship between the two singers (bow chicka wow wow!).

Thanks to the game, we've now learned that Justin has never had phone sex (really?!), he and Madonna have both forgotten the name of the person they were hooking up with before (eek), and all three have fooled around with someone and their sibling.

Madge was WAY into the game, asking if they could use the paddles to spank each other and even inventing her own bonus round (which, by the way, ended with her admitting she’s had sex with more than two different people in one day).

The Rebel Heart icon and the recently roasted birthday boy also got mighty cozy on the couch, cuddling up to each other as M playfully mused, “I feel like I’m getting to know my new boyfriend.” Third wheel much, Ellen?

Well, at least if Madonna and Justin ever do date, they can rest easy knowing that they've got some awkward questions out of the way -- even if the Biebs did stretch the truth a little bit. Ellen def wasn’t buying it when Justin said he wants to “keep things special” for his future wife.