Pop Icon Britney Spears Turns 33 Years Old Today! See Some of Her Hottest Videos Here

It's pretty hard to believe that little Britney Jean is 33 years old today! We're celebrating Britney Spears's birthday with some of her most infamous songs.

Starting with her first album, ... Baby One More Time (1999) was a time when critics were describing Spears as too silly and premature. Boy, were they wrong! Britney was only 17 years old when this chart-blowing album came out.

Oops! ... I Did It Again was the now-mother-of-two's second studio album, which included the dance-pop and teen-pop song with the same name as the album. The dialogue in the beginning is also a reference to the 1997 film Titanic.

Stronger: Who can forget the song that hit the Hot 100 charts but also landed in the top 20 of the Pop Songs radio airplay charts?

(You Drive Me) Crazy was her 1999 hit song off her ... Baby One More Time album and was the lead cut from the 1999 romantic comedy Drive Me Crazy starring Melissa Joan Hart.

I'm a Slave 4 U was one of Spears's first songs to bring the element of sexual innuendos to her music. The song also featuring urban influences and Middle Eastern flavor.

Everytime was a song Britney recorded after her relationship ended with pop singer Justin Timberlake in 2002. The catchy slow song is considered a pop ballad that hits close to home with fans for its lyrics that consist of forgiveness and hurting a former lover.

Toxic is from Spears's In the Zone album and features new music tempos like aggressive electronic sound effects, something that was new for the singer.

Scream & Shout is one of Britney's newest releases featuring Will.i.am and is a slew of club beats that has hit clubs nationwide.

Readers: What are your fondest memories of Spears? What did you think of her then and what do you think of her now? Let us know down in the comments section!