“…Baby One More Time” (1998)

“Oops!… I Did It Again” (2000)

She did it again, but it definitely wasn’t an “oops.” Spears proved that her first album wasn’t a fluke when she struck gold for a second time with the title track off her second album, Oops!... I Did It Again. As a cute Martian in a skin-tight red jumpsuit, she sparked a dance craze and coyly admitted that she’s “not that innocent.”

“I’m a Slave 4 U” (2001)

She was anything but coy in the video for this Neptunes-produced track. It was her raciest video yet, featuring an orgy of half-naked, sweaty dancers grinding against each other. It was already pretty clear by now that Britney was far from the beacon of chastity that she once claimed, but this was her first time really embracing her new image as a sex goddess.

“Stronger” (2001)

Britney at her peak getting funky with a chair, driving stick, standing in the rain touching herself and doing a lot of defiant strutting. She traded her demure teenager image for that of a woman oozing confidence and sexiness, and she showed the world that all the speculation about her personal life was only making her stronger.

“Me Against the Music” (2003)

Two generations of iconic, controversial blondes teamed up for this video so there was no way it couldn’t be a winner. When Britney and Madonna, fresh from their shocking lesbian kiss at the 2003 MTV VMAs, collaborated for "Me Against the Music" we knew the sparks would fly. The video shows Britney chasing an elusive Madonna through a dingy underground club before finally catching her and throwing her against the wall for a kiss only to have her vaporize into thin air.

“Toxic” (2004)

Who could possibly forget her wearing nothing but a silver thong and a few artfully placed jewels in this video? Spears portrayed several alter-egos for “Toxic”—thieving flight attendant, motorcycle-riding superhero and raven-haired murderer—but the shots of her writhing around covered in nothing but glittering diamonds really made our jaws drop. Many fans consider this both her best single and best video, but if we know anything about Britney, the best is yet to come.

“Everytime” (2004)

It wasn’t the hip-shaking kind of video we had grown accustomed to seeing from Brit, but it was a telling track, rumored to be an apology to her ex-boyfriend Justin Timberlake. In the original version, she drowns herself in the tub and dies, but it sparked a wave of controversy from parents who felt she was glamorizing suicide. In response, producers added the last bit of her regaining consciousness.

“Circus” (2008)

Her second attempt at a comeback was much more successful than the clumsy, out of shape and dazed Britney we saw at the 2007 VMAs. Here, she’s back to fighting form with a new album and her old dance moves, slithering seductively and declaring “all eyes on me.” They always have been, Brit.

“3” (2009)

Operation Britney Spears’s Comeback is officially complete. The video for this heavily rotated and super-suggestive track from her The Singles Collection was all classic Britney—barely there outfits, butt swaying dance moves and sexy backup dancers fawning all over her. By now we all know the mother of two is no virgin, but she pushes the boundaries lauding the joys of group sex with lyrics like, “Three is a charm/Two is not the same/I don't see the harm/So are you game?”