You guys, this is a big deal — Kylie Jenner has officially exited teenagedom! That’s right, the youngest Kardashian-Jenner is growing up right before our eyes. The now 20-year-old celebrated in a more low-key fashion this year than last year, in what looked to be an intimate surprise party with her friends and family.

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For the big one-nine, Ky threw a star-studded bash and also took a trip to Turks and Caicos with her entourage. But for her entrance into her 20’s, the lip kit mogul laid low and posted about sitting poolside at momager Kris Jenner’s house. But the style of celebration wasn’t the only thing that’s changed over the past year.

Kylie’s boobs have seemingly doubled in size since her last birthday, and honestly, it’s pretty shocking to look at side-by-side. Though the reality star is a queen at denying boob job rumors, unless she’s like a reeeallly late bloomer, we’re not sure what she owes this cleavage upgrade to.

kylie jenner birthday

Here’s Ky just yesterday vs. this time last year. (Photo Credit: Instagram)

Though there is a definite difference between the two snaps, Kylie has never come clean about enhancing her breasts. Whether she’s saying it’s her time of the month or just crediting her growing chest to weight gain that apparently goes to all the right places, it seems as though she’s got an arsenal of responses to combat surgery claims. She’s even posted about it on her blog.

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"No ass implants," she said to her fans in a post that also denied facial reconstructive surgery and breast implants. "You know, I used to be 120 [lbs.]. I told everyone, 'I'm like I'm 120.' I was like 16, I ride in my little G-Wagon. I was really skinny. I'm pushing 136. But it's alright I like the chunkiness."

Well, Kylie all we can say is that our chunkiness doesn’t make us look like that, so good for you! Happy birthday, girl!