Christina Aguilera is one American singer who successfully shed her Disney image to something bigger and sexier when she came out with her debut single. The singer-songwriter-actress has given us many big hits including "Beautiful" and "Genie In a Bottle" at the start of her career. She has also starred in films like Burlesque which had an amazing soundtrack and who can forget Aguilera's beautiful performance in it on the song "I'm a good girl". The American singer has bagged five Grammys and also a Latin Grammy award.  Christina Aguilera Goes Makeup Free for Paper Magazine, What are the Benefits of Not Wearing Makeup?

It's almost impossible to get over Christina's songs and some of them have survived generations and fans are still hooked onto them. As the singer celebrates her birthday on December 18, she turns 39 and we look at some of the biggest hits in her career. Here are some of her best tracks!

1. Beautiful

This is hands down one of the best Christina Aguilera song. The lyrics to this song are actually "Beautiful" and with Aguilera's amazing voice, there's hardly anything not to like. With the strong message that this song sends out, it completely makes it an epic number.

2. Genie In A Bottle

For many of her fans, the earliest memory of Christina Aguilera must be this song. It released in 1999 and if you're a true fan, you can probably sing the entire track on karaoke today too. The song became a massive hit and almost remained at the top spot on Billboard for about two weeks straight which is huge.

3. Lady Marmalade

This another of biggest hits of Christina's career and probably also one of her best collaborations. The singer performed to this amazing track with Lil Kim, Pink and Mya and that's why this was an instant hit. The 2001 track is a legendary number that will get you nostalgic of your times if you listen to it today.

4. Moves Like Jagger

This is yet another collaboration and that too a recent one that had Aguilera lend her amazing voice to. The 2011 Maroon 5 track is a hugely popular club hit today and we definitely have to say with her portion in the song, Christina totally killed it. This track is a must-play at every party! Christina Aguilera Doesn't Want to Influence Her Kids Too Much.

5. Say Something

This is another track by the singer that is one of the biggest hit of her career. "Say Something" is one track that Aguilera was super impressed with when she heard it on So You Think You Can Dance and soon wanted to collaborate with A Great Big World for the same. The number managed to get a top spot when it released and also finished second in her top 20 list of greatest hits.

It's been a while since we heard Aguilera bring a peppy number to our playlist and it would be great to see the singer collaborate with some new artists. Imagine a Christina Aquilera and Ariana Grande collab, we would totally ship this combo.

(The above story first appeared on LatestLY on Dec 18, 2019 09:45 AM IST. For more news and updates on politics, world, sports, entertainment and lifestyle, log on to our website latestly.com).