Maksim Chmerkovskiy Kate Upton Mystery Solved

EXCLUSIVE


We now know what in the Hell Kate Upton was doing hanging out with "Dancing With the Stars" dude Maksim Chmerkovskiy -- and we're still not happy about it.

As we previously (and jealously) reported ... Maks and Kate were spotted leaving a restaurant together in NYC last week.

hero_kate_upton_maksim_chmerkovskiy_splash
So, of course we've been wondering how someone known as the "bad boy of the ballroom" ... managed to bag the hottest chick on the planet.

Well, we ran into Maks at LAX, sans Kate, and asked if they're, y'know ... banging?

Let's just say we feel a little better ... for now.  But not much.