In honor of today (Dec. 2) being Britney Spears' birthday, we've compiled a gallery of photos of the pop icon throughout the years. From her very humble beginnings and tragic oughties fashion (no judgment, we're all victims of that decade's ready-to-wear looks) to the start of what would eventually become an immense and legendary career, all the way up to her current days as a mother of two -- we've got the photos spanning her career!

We all remember where we were when 'Baby One More Time' was blowing up the airwaves and totally dominating the TRL countdown. We remember the exact moment it was announced she and Justin Timberlake were no longer an item. Not to mention her legendary performances -- from that racy kiss with Madonna to the time she sang 'I'm A Slave 4 U' with that crazy intense boa constrictor.

So celebrate Britney's 33rd birthday by checking out the gallery above!!