In our imaginary tiny waist contest, it looks like Khloé Kardashian has officially taken first place from her big sister Kim Kardashian. In a post-workout selfie, Khloé showed off her abs and lean figure, putting her curves on full display for her millions of followers.

“I think I only work out so I can stuff my face for taco Tuesday! PS — I have no idea why my abs look so strong in this pic but I had to post so I don’t feel so guilty about gorging tonight,” the KUWTK star captioned the sexy snap. And fans were definitely loving her body. Watch the video below to see her tinier-than-ever waist!

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“You are such an inspiration to people! Keep it up girl,” one commenter wrote, before another added, “I love it that you keep it real about that abs!” However, haters will say that it’s Photoshop…

“I need to remember the date today!! Never would I have ever thought I would be in the media for being “too skinny”. What on earth?!?!” Khloé, 33, tweeted last year. “First I’m too fat and now I’m too skinny. I love this game!!”

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Kim, 36, recently showed off her snatched waist at the opening of Balmain’s first LA boutique, wearing a white crop top and sequined skirt with thigh-high slit. Just like her younger sister, Kim has been hard at work in the gym — especially after those unflattering photos from her Mexican vacation surfaced.

“I saw these awful photos of myself when I was on a trip in Mexico and people were photoshopping them and sharpening them,” Kim said on The View. “I mean I definitely was not in my best shape. I hadn’t worked out in 12 weeks. I had two surgeries on my uterus… I was already not feeling like myself, and then when people were sharpening them and making them look way worse and then those were going around, I was like, ‘Okay. I’m gonna get it together.’”

Who are we kidding? Both girls are killin’ it. For a look back at Khloé’s complete transformation, check out the gallery below!