Happy 30th Birthday, Christina Aguilera!

With the pop icon celebrating a milestone birthday on Saturday, we take a look at the momentous events she experienced over the past year.

[artist id="509026"]Christina Aguilera[/artist] has hit a big milestone in her life. On Saturday (December 18), the singer turned 30. Meanwhile, her final year in her 20s was quite a momentous one. MTV News takes a look back on the pop powerhouse's 2010.

Aguilera kicked off the year dropping hints about her album Bionic, sharing that it would be all "about the future," embracing dance music in a way she hadn't done with past releases. In March, Aguilera declared she was "Not Myself Tonight" on the record's sexy lead single.

"You will find on this album songs that represent the many sides of me," Aguilera shared weeks later in a message posted on her website. "I have learned that like all women I am sometimes capable of being superhuman. Like all women I am BIONIC."

As the album's release approached, Aguilera took a few jabs at those who compared her new tune to Lady Gaga, declaring that her "work speaks for itself," and before long she was embracing Xtina in her video for "Not Myself Tonight."

In the late spring she then hit up both the "American Idol" finale, where she got teary, and the MTV Movie Awards, where she got sexy. Then, in October, her career took a backseat in the media spotlight when she and her husband, Jordan Bratman, announced that they were divorcing.

But as that month became November, the focus went back to her career ventures, including the release of "Burlesque," her star on the Hollywood Walk of Fame and a performance at the American Music Awards.

As the end of 2010 approached, Aguilera released a track with T.I., had some racy private photos hit the Web, had some people complaining about her sexy performance on "X Factor," was nominated for a Golden Globe thanks to her musical contributions to "Burlesque" and even had time to find love again.

What will Aguilera do in 2011 to top a year as action-packed as this one? Well, fans will have to wait and see, but maybe she'll kicks things off by taking home a Golden Globe.

Want to wish Christina a happy 30th birthday? Send a message to her in the comments.