Britney Spears has changed her look many times throughout the years -- blonde, brunette, shaved head, bangs, center-parted and extensions. She has also had her emotional ups and down, with her husbands, kids, boyfriends, managers, parents and the paparazzi. There has been one constant through it all and that's Brit Brit's warm and winning smile!

As she inched towards her late 20s and early 30s, things leveled out and calmed down for the sexpot superstar both personally and professionally. She is a proud mom of two, is still putting out great dance music and continues doing her thang!

We've compiled our favorite shots of Britney and her infectious, enviable, toothy smile here. Her smile is so pretty and like a dose of sunshine in our day! And she has a really good dentist.

What an infectious smile! Brit was caught mid-laugh here.

Kevin Winter, Getty Images

Glossy lips, golden hair.

Christopher Polk, Getty Images

Mysterious, like a cheshire cat.

Tim Mosenfelder, Getty Images

My, what nice teeth you have, Brit!

Frazer Harrison, Getty Images

Who's making Brit laugh?

Ethan Miller, Getty Images

Look, Ma, two (dirty) hands and a purdy smile!

Kevin Winter, Getty Images

Simple, warm and inviting -- her smile.

Jason Arthurs, Getty Images

Brit Brit in mom mode -- that's a natural, lit-from-within glow.

Pacific Coast News

Looking at someone sideways, but with a twist.

Kevin Winter, Getty Images

It's a good thing Brit has nice teeth, since she flashes her chompers a lot.

Kevin Winter, Getty Images

On the go, hair in a bun, paparazzi following her, smile in tact.

Pacific Coast News

Shades and a smile.

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A mouthful of hair!

Rick Kern, Getty Images

Brit may have been a brunette but the smile was still 14 karat.

Frederick M. Brown, Getty Images

With boys this cute, how can she not smile?