Here's an entry about her at Wikipedia
Katy Perry was born Katheryn Elizabeth Hudson in Santa Barbara, California.[1] The second child of two pastors,[2] she has an older sister and younger brother.[3] Her Evangelical mother, Mary Hudson, grew up in Southern California and had "a tempestuous first marriage in Zimbabwe".[3] Her father was a West Coast scenester in the 1960s.[3] Perry's uncle and aunt were director Frank Perry and screenwriter Eleanor Perry.[4]
Baptized a Christian, Perry was incorporated to her parents' ministry,[2] and she started singing in their church from the age of nine; she continued singing in the church until she was 17.[1][5] She grew up listening to gospel music[6] and was not allowed to listen to what her mother called secular music.[5][7] Perry attended Christian schools and camps.[2] As a child, Perry learned how to dance in a rec hall in Santa Barbara. She was taught by seasoned dancers and began with swing, Lindy Hop, and jitterbug.[8] She took her GED after her freshman year of high school and decided to leave school to pursue a career in music.[9] Perry initially started singing "because I was at that point in my childhood where I was copycatting my sister and everything she did".[9] Her sister practiced with cassette tapes, and Perry took the tapes herself when her sister was not around. She rehearsed the songs and performed it to her parents, who suggested she should take voice lessons. She grabbed the opportunity and began taking lessons at age nine to 16. She enrolled in at the Music Academy of the West in Santa Barbara, and studied Italian opera for a short time.[9]
Lryics goes here
You change your mind like a girl changes clothes
Yeah, you change your mind like a girl I would know
And you always think, always speak cryptically
I should know that you're no good for me
'Cause you're hot and you're cold
You're yes and you're no
You're in and you're out
You're up and you're down
You're wrong when it's right
You're black and it's white
We fight, we break up
We hug, we make up
You, you don't really wanna stay, no
But you, you don't really wanna go, oh
'Cause you're hot and you're cold
You're yes then you're no
You're in and you're out
You're up and you're down
We used to be just like twins, so in sync
The same energy now's a dead battery
Used to laugh 'bout nothing, now you're plain boring
I should know that you're not gonna change
'Cause you're hot and you're cold
You're yes and you're no
You're in and you're out
You're up and you're down
You're wrong when it's right
You're black and it's white
We fight, we break up
We hug, we make up
You, you don't really wanna stay, no
But you, you don't really wanna go, oh
You're hot and you're cold
You're yes and you're no
You're in and you're out
You're up and you're down
Someone call the doctor
Got a case of a love disorder
Stuck on a roller coaster
Can't get off this ride
You change your mind like a girl changes clothes
'Cause you're hot and you're cold
You're yes and you're no
You're in and you're out
You're up and you're down
You're wrong when it's right
You're black and it's white
We fight, we break up
We hug, we make up
You, you don't really wanna stay, no
But you, you don't really wanna go, oh
You're hot and you're cold
You're yes and you're no
You're in and you're out
You're up and you're down
