She was the princess of pop music with an edge less rounded than was usual for American pop stars. Christina Aguilera has really used her voice to her financial benefit. She is estimated to be worth a whopping $100 million dollars, with a yearly salary of even more — $130 million.

She came onto the pop music scene in the naughties and simply wowed people with her powerful voice and provocative nature. Aguilera is only 36-years-old and it’s safe to say that she, could retire and not have to get a job at her local 7-11.

Aguilera is, of course, primarily a singer. But she’s not just that. She is a prolific dancer and she also writes much of her own lyrics.

She was raised in Pennsylvania, and was one of those true American child stars. Aguilera appeared on TV series Star Search and The Mickey Mouse Club when she was a kid. Her pretty face and vocal assets didn’t go unnoticed, needless to say.

After that appearance, Aguilera soon signed with RCA Records, and launched her hugely popular "Genie in a Bottle”. That was a huge hit that grossed multiple millions.

Following a series of successes, Aguilera took full reigns over her fourth album Stripped, in the early 00s. It had on in the classics such as Dirty and Beautiful, which showed her maturing as an artist and pop musician.

Five years ago, in 2011, she starred on popular US TV show The Voice, and has appeared on many more since.

The famous Aguilera once said: “It's definitely a dream come true to be recognized and to be able to sign autographs. But, it's also a lot of hard work and can be draining. If you don't know already, you will quickly learn who your real friends are.”

Who needs friends when you’ve got that kind of cash. No, no. Silly, you need them more than ever because apparently it’s harder to trust people; beware of the money-grabbers.

But with Aguilera it is not just about the money. She is an enthusiastic animal rights campaigner, and she even went as far as signing a letter for PETA, which was addressed to the South Korean government, in a hope to encourage the them to stop eating dogs. At least she tried.

Such as her stardom, she has performed and collaborated with the likes of Cher, in a film called Burlesque, and other rich and famous stars. The biggest inspiration throughout her career was great blues singer Etta James, and Aguilera was even asked to perform at James’ influence — a rendition of the latter’s classic song At Last.

And what would such fame be useful for if nothing else but promoting or endorsing various products. Well, Aguilera has done so for a range of top brands, including: Sears, Levi’s, Skechers, Mercedes, Versace, Virgin, Orange, Sony Ericsson, and Coca-Cola, among others.

“You used to have to sing and convey emotion, and now, well, technically you can do anything with technology. It sucks for music today, but that's why that old music feels so good to me.”

It might suck for music, but it doesn’t suck for your bank account.