If you are talking about the song toxic, the singer is Britney Spears I think...
Britney Spears sang "Womanizer".
On the X Factor 2009, they sang Oops... I did it again By Britney Spears :)
This song was recorded by Britney Spears. It was released as part of her second album of the same name. The song and its official video can be seen on YouTube.
Who sang shattered dreans answer Johnny Hates Jazz
Since the song was written/produced in November 1999, Britney Spears would have been about a month shy of her eighteenth birthday.
The Rolling Stones wrote and recorded that song, nearly FORTY YEARS before Britney's cover version.
Get It - Britney Spears song - was created in 2003.
I Will Be There - Britney Spears Song - was created in 1999.
Britney Spears had a song called "The answer" on her fourth studio album as a bonus track in 2003
"Oops!...I Did It Again" by Britney Spears is the first song on her second studio album Oops!...I Did It Again.
Out From Under - Britney Spears song - was created in 2008.