Her second album called Oops! I did it again which debuted in 2000. She had a very popular single, Oops! I did it again. Everyone in this world has heard this single. After she debuted this album, it was very successful in that time and sold about 1.3 million copies in the first week. She became the youngest singer who could sell only two albums over 22 million copies in U.S.A. and she was a presenter of many products such as Pepsi, camera, and so on. She launched her first world tour, Oops! I did it again tour.This is the new record in the world.
The third album was the new thing that she did. She changed her music to be club dance and also changed her image to be sexy woman and named her album, Britney. Her hit single in this album is I'm not a girl, not yet a woman. The album was successful but not much when compared with the first and second album. She was a presenter to Toyota Vios in that time and use her song, anticipating , to promote the product. She had a tour called Dream within a dream in November 2001 and the ticket was sold out rapidly. In 2002, she had a movie, Crossroads which was her first starring. She stopped her tour because the bad weather in Mexico. She announced that she would take a break for 6 months.
In 2003, at MTV Video Music Awards she joined with Madonna and Christina Aguilera to perform their show. In this show, Britney and Christina wre kiss by Madonna. But the camera just focused on Britney and Madonna.
Next album is called In the zone which greatly changed and released in the end of 2003. The album was still pop dance but added hip hop into it. The first single was Me against the music which was featuring Madonna. The very hit single is Toxic which won her first ever Grammy Awards category of Best Dance Record. Her tour called The Onyx Hotel Tour which was successful but had to cancel in June 2004 because she injured her knee during making video called Outrageous. In the same year she released her greatest hits called Greatest Hits: My Prerogative.
She married childhood friend Jason Alexander for 55 hours at The Little White Chapel in Las Vegas on January 3, 2004.
In July, she revealed her new boyfriend, Kevin Federline and announce that they were going to get married. In September, they got married at a residence in Studio City, California. Then they gave birth to Sean Preston Federline, her first son.
After she got married Kevin Federline and had a baby, she announce that she pregnanted again in 2006. She gave birth to the new baby, Jayden James Federline on September 12 in Los Angeles. 
It is like rebirth. Everyone said that she has returned and will be pop princess again. Her first single called womanizer which went to the top of the chart. the critics called this album that the comeback album.
