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#YouCantPartyWithUs10 Photos from Riccardo Tisci’s Birthday Party That Prove He Had the Best Party EVER!

Riccardo Tisci's 40th birthday party on Friday night in Ibiza must have been the best party EVER! Why? Because celebs can't stop sharing photos from it!

As soon as we saw that P-Diddy was there to celebrate with the Givenchy designer, we knew something went down that night—especially since Paris Hilton and Kim Kardashian were at the same party!

And let's not forget about bad boy Justin Bieber.

So what really happened? These 10 photos pretty much sum it up.