Britney Spears ready for big 3-0

Britney Spears on turning 30, on Dec. 2: “I hear the older you get, the wiser you get and the more you know what you want, so hopefully it’ll be a good year.”

LONDON -- The singer who created a sensation when she hit the music world in pigtails and knee socks is turning 30 -- and Britney Spears said she's looking forward to it.

The U.S. pop star will be on the South American leg of her "Femme Fatale" world tour when she celebrates the landmark birthday on Dec. 2.

"I hear the older you get, the wiser you get and the more you know what you want, so hopefully it'll be a good year," said the woman who was once one of the Internet's most-searched names.

Spears kicked off a string of European tour dates Thursday in St. Petersburg, Russia. She has spent the summer performing across North America to generally positive reviews.

"The audiences have been just amazing, they've been so great to bounce off of and the energy I get from them, it's great, it's really cool," she said.

Her seventh studio album, "Femme Fatale," debuted at No. 1 in the U.S. Billboard charts and globally, and Spears targeted it at her female fans.

"With the big picture of being 'Femme Fatale,' I think it is really inspiring for girls all together feeling very empowered and having a voice and being heard."

Spears was in London to promote her U.K. gigs, which include two in October at London's O2 Arena. After Russia, she tours across Europe before heading to South America in November.

With more than 35 concerts left to play before her final date -- Dec. 10 in San Juan, Puerto Rico -- it's a demanding schedule, and staying healthy and fit is high on her agenda.

"I have a good group of people around me, and we have the show at a certain time every night and we just try to stay consistent on having a routine," she said.