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We Want To Know The Best Crossovers In TV And Movies

Tell us about the times fictional universes collided.

We all know that TV shows and movies exist in their own, constructed universes.

But sometimes, worlds collide. So tell us: what's your favourite fictional universe crossover?

Do you love the fact that in Friends, phoebe's evil twin Ursula is a real character from Mad About You?

Perhaps your favourite episode of Brooklyn Nine-Nine was when Jess from New Girl showed up.

Or maybe you still can't get over the time that The Simpsons and Family Guy's worlds collided.

Whatever they are, tell us your favourite crossovers, and you could be featured in a future BuzzFeed Community post or video!