You can now shop all of Kylie Jenner's 21st birthday looks (and they're so cheap!)

Fast fashion at its finest.

By Katie Stow

ICYMI it was Kylie Jenner's 21st on the weekend and the celebrations involved an all-pink venue, so many celebs, Kylie's first ever legal drink and a massive three outfit changes from the birthday girl.

The whole thing was more extra than a jumbo pack of spearmint gum.

As we expected, everyone was instantly obsessed with both of the birthday girl's dresses and the looks chosen by the rest of the Kardashian-Jenner clan.

Kylie opted for a pink silk shoulder-padded number for her first look and followed up with a blush pink bedazzled body suit, while Kim Kardashian wore a skin-tight peekaboo Yeezy mini dress.

Literally THE NEXT DAY, these next three looks were teased on the Fashion Nova website — proving that fast fashion really can be that fast.

Their Kylie-inspired collection is called "Birthday Behaviour" and while there's no specific release date for the looks, it has been teased as "coming soon" on their Instagram. But if their design and photoshoot turnaround is anything to go by, we reckon this shit will be up by tomorrow.

Here are all the side by sides of the collection, truly proving that while Kris Jenner works hard, Fashion Nova works harder.