27 Photos That Portray Britney Spears' Unforgettable Fashion Evolution

'99 did us proud, did it not? Here, Britney Spears is celebrating her "Baby One More Time" single, but looking back at the snapshot, we're celebrating the fact that she's wearing the equiv. of sequined pajama bottoms.

How do you make a pink vinyl crop top matchy-matchy? Knee-pads.

In September of '99, our girl Brit kept up the crop top fever (before Miley, we might add) and added even more oomph with glittery slacks.... Like you didn't own a pair...

In 1999, Brit was named the Female Artist of the Year. She accepted her award in a baby pink spaghetti strap frock—AKA, the dress you probably wanted to wear to prom.

Britney Spears showed up to the 2000 Teen Choice Awards in an ensemble that screams "change of the century." That, of course, would be a massive amount of pink fringe and strappy sandals that show off the ankles.

Va va voom, Brit! She rocked a little sex appeal to the MTV VMAs (before the Madonna moment) with a LBD (long black dress) with a majorly high slit.

You had a dress like this, right?

Changing up the typical crop top (and simultaneously making the ensemble much, much more '00) Britney rocked a lacy bustier with a choker necklace and crimped hair.

When it's too chilly for a tummy-baring top, you just wear a ruched and cropped jacket. Duh.

If you remember correctly, Brit was a particular fan of the newsboy cap.

She even wore the hat on red carpet dates with JT.

Britney Spears dressed up for her Crossroads premiere in a lacy bustier and a black newsboy cap.

It may remind you of Tinkerbell, but this dress she wore to the AMAs show in '03 is kind of adorable.

Take a moment to remember the velour tracksuit and how you, Brit, and Sophia Bush's character on One Tree Hill loved them so.

By now, you probably get the trend that Brit was going for.

See above for the most famous pink fur coat out there.

In 2004, Britney Spears attended the Billboard Music Awards in a green and black mini dress clad in her fave fabric—lace!

Britney Spears, KFed, and a sparkly LBD. Discuss.

Britney Spears rocked a LWD and a fedora to an even in Las Vegas back in 2007.

Thought the Kardashian sisters made this silhouette famous? Please!

Before Jennifer Lawrence owned the see-through skirt, Britney Spears flaunted the style with dark brunette locks.

So Brit's bod looks absolutely slammin' in this chartreuse bandage dress.

You can't go wrong with an LBD, Brit!

When Britney became an X Factor judge, she gave her red carpet wardrobe a makeover with a more sophisticated lacy mini.

She even switched things up with a much-longer, but totally gorgeous hemline and a print!

Thought one-shoulder mini dresses were totes out? Not if Britney wants to rock 'em.

Excited for Brit's Las Vegas show? Hopefully she wears a few stunners like this!