Looks like "Dancing with the Stars" professionals Cheryl Burke and Maksim Chmerkovskiy did more than just dance together this weekend in Las Vegas.

With a professional photographer roaming the dance floor at club Moon at the Palms on Saturday night, Twitter user @DWTS_Gossip noticed some interesting action going on in the background of a couple pics.

Yes, that's Maksim in the yellow holding onto Cheryl ... and it looks like they're kissing! Also, in the back of another shot, Maks can be seen holding Burke close while grabbing her hair. Check out all the club pics above!

The two were seen together earlier in the weekend at the Encore, where they celebrated the one year anniversary of the hotel's Beach Club.

So, what do you think? Just friends ... or something more?