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Maci Bookout enjoyed a memorable Las Vegas weekend, centered around her bachelorette party at a trendy club, ahead of her upcoming wedding to fiance Taylor McKinney this fall.

The Teen Mom OG star, 25, let it all hang out, having a good time immersed in Sin City revelry, complete with a poolside excursion to the Aria Resort's Liquid Pool Lounge Saturday afternoon with a troupe of her pals. There, she looked to be in excellent physical shape - just three months after giving birth May 31 to her son Maverick - while wearing a blue bikini.

The mother-of-three rounded out her look with a cap that read 'Bride' on it, and a tutu-like bow affixed to her rear end. She posted to Instagram a video of her twerking skills with a preemptive apology to those she had a hunch wouldn't approve of her risque antics: 'Sorry Mom! #GingersLastBinger.'

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Sunday funday: Maci Bookout, 25, enjoyed a Sunday poolside party at the Hard Rock Casino's REHAB pool resort in Las Vegas, where the Teen Mom OG star celebrated her upcoming wedding to fiance Taylor McKinney over the holiday weekend 

Maci pulls a Miley: The mother-of-three let her guard down amid the sun-splashed fun at the Aria Resort, posting a clip of herself twerking in a bikini - while simultaneously apologizing to her mother for it!

The Tennessee native kept the fun going Saturday night at The Mirage's trendy 1 OAK club, looking sexy and tan in a sheer white romper with beige sandal heels and a black sash that read, 'Mrs. McKinney' in gold lettering. 

Maci took pictures at the club with her large group of friends, toasted with champagne and posed with a large pink cake baked especially for the occasion. 

The club's attractive staff contributed to the atmosphere, holding signs with giant letters that spelled out, 'Congrats Maci.'

Beautiful bachelorette: Maci looked her best Saturday night at 1 OAK Las Vegas, where she was flanked by friends to celebrate her upcoming exchange of vows 

Last hurrah?: The Sin City weekend was a welcome getaway for the MTV beauty, who gave birth to her third child in May and has had her hands full planning the wedding all summer

Eyes on the prize: Bookout couldn't be more elated to be tying the knot with Taylor, who she has two children with 

Maci, who penned her memoir Bulletproof last year, has a son named Bentley, aged seven years, from her relationship with ex Ryan Edwards, as well as two children with 27-year-old Taylor: toddler daughter Jayde, aged one year, and infant son Maverick, aged three months.

On Sunday, it was back to the pool, as this time Maci frequented REHAB, the fashionable pool resort located on the grounds of the Hard Rock Casino.

The weekend breather surely helped Maci blow off some steam as her 2016 has been packed, beginning with with Taylor's January proposal; Maverkick's birth in May; and a wedding planning process Maci said has been taxing on her as the big day arrives.

Toast time: Maci raises a glass of champagne with a gorgeous gal pal who accompanied her to the 1 OAK bash

She takes the cake: The club gave the MTV personality the full V.I.P treatment for her bachelorette bash

She told People last month: 'Planning is going well, but I absolutely hate it, to be honest. It's just a lot to do, even with a wedding planner.'

Maci, who said the theme of her wedding will be 'somewhat rustic,' complained about the amount of micromanaging it takes to make one's nuptials go off without a hitch.

'There are just so many little details that it can be quite overwhelming!' she said. 'I'm the type of person that I don't really care about all the decorations and flowers and stuff.'

Happy couple: This fall will mark Maci's wedding to her longtime beau, Taylor 

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