Kim Kardashian has over 2 million Instagram fans -- and considering the photo she just posted to thank them, it's pretty easy to see why!

"Thanks to all you 2million sexy beasts out there for following me on Instagram," she said moments ago. "So heres a little present of me in full on beast mode! LOL"

The photo attached shows the reality TV star on all fours, crawling on a couch in a leather fringe jacket, boots and what looks like some very skimpy bikini bottoms.

This is the second revealing photo she's shared with fans this week alone ... check out some of her sexiest Instagrams and TwitPics (so far!) above.

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