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 [article id="1629061"]Bionic,[/article] 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 [article id="1635096"]"Not Myself Tonight"[/article] on the record's sexy lead single.

"You will find on this album songs that represent the many sides of me," [article id="1635096"]Aguilera shared[/article] 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 [article id="1635096"]Lady Gaga[/article], declaring that her "work speaks for itself," and before long she was embracing Xtina in her [article id="1638840"]video for "Not Myself Tonight."[/article]

In the late spring she then hit up both the [article id="1640157"]"American Idol" finale[/article], where she got teary, and the [article id="1640891"]MTV Movie Awards[/article], where she got sexy. Then, in October, her career took a backseat in the media spotlight when she and her husband, [article id="1649988"]Jordan Bratman, announced that they were divorcing[/article].

But as that month became November, the focus went back to her career ventures, including the [article id="1651898"]release of "Burlesque,"[/article] her star on the Hollywood Walk of Fame and a performance at the [article id="1652768"]American Music Awards[/article].

As the end of 2010 approached, Aguilera released [article id="1653167"]a track with T.I.[/article], had some [article id="1653856"]racy private photos hit the Web[/article], had some people complaining about [article id="1653856"]her sexy performance on "X Factor,"[/article] was [article id="1654197"]nominated for a Golden Globe[/article] 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.