Khloe Kardashian has the over-the-shoulder pose down pat!

The "Keeping Up with the Kardashians" star celebrated her 30th birthday party with yet another bash on Friday night in Las Vegas, where she got wild with boyfriend French Montana at TAO Nightclub inside the Venetian.

Sporting a very short (and very tight) sparkly black mini with semi-sheer cutouts, the 30-year-old looked sexier than ever -- popping out that famous family booty on the red carpet. With her blonde locks in loose waves and a pale pink lip, this might be one of Khloe's hottest looks to date.

This is the third celebration for the reality TV star, who had a big family dinner on the eve of her actual birthday in NYC and a yacht party the following evening. Montana went all out for his girlfriend, presenting her with a $25,000 gold ring and a Jeep Wrangler Sahara.

Not too shabby, right?!

Check out the gallery above to see more photos from inside her Sin City soiree.

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