The Summer Of Sexy Selfies? Kim Kardashian Shows Off Bikini Bod From Exotic Mexican Beach

June 13 2014, Published 9:16 a.m. ET

It’s Kim Kardashian’s world, we just live in it.

The 33-year-old socialite posted two sexy bikini pics she took of herself Thursday, as she enjoys a post-honeymoon vacation in Punta Mita, Mexico, calling the lazy day on the beach “tan time.”

The newlywed reality star — who’s in the gorgeous location with husband Kanye West, 37, is preparing to celebrate her daughter North’s first birthday on Sunday — has clearly shed, and kept off, every pound she gained during her pregnancy with her first child, answering back to critics who incessantly knocked her pregnancy fashions and looks.

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Perhaps Kim’s selfies were also her response to recent pics of another Hollywood socialite/marketing machine whose life has been documented by reality cameras, one Jessica Simpson. The blonde beauty has been showing off a sleek, chiseled new look as of late, and some insiders say it might have sparked a fire in the fiercely-competitive Kim.

“Kim has been watching Jessica’s phenomenal body transformation very carefully,” the insider said. “Jessica’s latest triumphant pictures show that she’s achieved a streamlined shape that has Kim in tears of envy.”