Britney Jean Spears (born December 2, 1981) is an American singer, songwriter, dancer and actor
I remember some of her music, do you know what was her most popular song?
Her first and second studio albums, "...Baby One More Time" (1999) and "Oops!...
And is she still singing, what is her most recent album?
Blackout", was released later that year, and spawned singles such as "Gimme More" and "Piece of Me".
Ok, so is that her latest album? I can't remember those songs.
Blackout is the fifth studio album released 2007 
So she have not released anything in more than 10 years.  It seems she's retired from singing at least.
Her behavior was erratic to the point that she was hospitalized and it continued through the following year, at which point she was placed under a still ongoing conservatorship