Happy birthday, Britney Spears! The stunning singer turns 39 years old today, and what better way to celebrate the star than by looking back at her transformation. Britney has been in the industry since she was just a kid, and she shot to superstardom in 1999 with her debut song and album: …Baby One More Time. At the time, Brit was just a teenager, and she proved to be the perfect combination of cute and hot, appearing innocent, but also sexy. She’s transformed quite a bit over the years, and we rounded up a bunch of photos from her time in the spotlight to show just how much things have changed between then and now.Since her very first music video, Britney has been known for putting her incredible dance moves front and center. Whether it was in a sexy schoolgirl costume, or a crop top and low-rise pants onstage, Britney showed just how much of a capable entertainer she was even in her beginning years. That soon emerged into a more mature attitude and style, featuring the young woman in smaller crop tops, which she often paired with short shorts or tiny skirts — her signature look! And who could forget when she put her rock-hard figure on display while performing with a SNAKE during the 2001 VMAs?!
Of course, Britney went through a bit of a rough patch in the mid-2000s, but she was able to get through it and make a massive career comeback. In 2012, she even appeared as a judge on The X-Factor. During that time, her style was much more reserved and covered-up, as she was also embracing her role as a mother.