Anything Kim can do, I can do better! Kourtney Kardashian showcases booty in gold bikini

WHEN your family is chock full of bootylicious socialites and high fashion clothes horses, sibling rivalry is pretty inevitable.

Usually this materialises in battling over the remote control or tattling on your sibling's secret stash of Playboys beneath their bed – but in the case of the Kardashian clan, booty battles are all the rage.
Kourtney Kardashian celebrated her 35th birthday on Friday, and marked the occasion by donning the exact same bikini her little sis had rocked just a week earlier.
Fans of the reality TV royals will remember Kim's mind-boggling rump being oiled up by her very own booty butler while she wore a skimpy metallic two-piece.
Well, it looks like there may be a few versions of the bikini floating around the Kardashian abode, as Kourtney modelled her impressive physique in the barely-there string number.

QUEEN OF CURVES: Kim wore a near-identical bikini on a shoot last week [SPLASH]

BEACH BOMBSHELL: Kourtney look incredible in her shimmering two-piece [SPLASH]

Showcasing her pert behind as she frolicked in Mexico, the mum-of-two's body would strike envy in the hearts of ladies a decade younger.
The eldest of the Kardashian bunch enjoyed a low-key getaway in Cabo San Lucas with her partner Scott Disick and her kids Mason and Penelope, but took a break from family fun to top up her tan in her glamourous beach attire.
While Kourtney didn't have a servant on hand to douse down her posterior with oil, she did seem to have a helper on hand to dress her in a complimentary bathrobe.
After rocking the shimmering golden two-piece, Kourtney must have realised that comparisons between her and her curvaceous sister would be drawn, and swapped this swimwear for a cobalt blue bikini the next day.
The brunette looked incredible in the bandeau number, shunning make-up and an elaborate hairdo for a casual beach look.

REALITY ROYALTY: Kourtney was assisted with her robe [SPLASH]

TRUE BLUE: Trying out for Baywatch, Kourt? [SPLASH]

After cuddling with her kids on the patio of their beach house, Kourtney stopped for a spot of sunbathing with Scott – who, as usual, couldn't keep away from his hi-tech gadgets.
The pompous businessman, who calls himself Lord Disick after being knighted in Britain, was distracted by his iPad and his smartphone, despite his gorgeous girlfriend standing near-nude beside him.
Are you sure you have your priorities in order, Scotty?
While Kourtney spent her birthday away from the rest of the Kardashians, there was plenty of social media love winging her way.

WHAT A GENE POOL: All the Kardashian sisters are blessed with jaw-dropping curves [SPLASH]

LOOK ALIVE, SCOTT: The Lord was distracted by his various gadgets [FAMEFLYNET]

Kim, Kendall and Khloe all posted adorable collages of their big sister on Twitter and Instagram, but the cutest tribute came from the Kardashian matriarch Kris Jenner.
Along with a throwback pic of her eldest daughter, the foxy 58-year-old wrote: "You are the most amazing daughter, sister, mother and friend I could have ever imagined. Thank you for bringing so much joy into my life.
"I love you more than I ever thought possible, or than I could ever have imagined. You are where my journey began. You are my heart."
No, we're not crying – there's just something in our eye.