As far as Pink is concerned, Britney Spears is crazy...but she doesn't have attitude.

The platinum haired singer has revealed that she would not act as a songwriter for the former princess of bubble-gum pop because she doesn't meet her requirements. According to Pink, Britney is not a true artist.

After Britney's behavior of the past few years - marrying and divorcing Kevin Federline, having two children, partying like a college student and shaving her head - Pink is another person who believes the "Crazy" singer is...er, crazy.

She said she wouldn't write music for the mother-of-twos upcoming album, "Not because I don't like (Spears) - I do think she's crazy enough to do one of my songs. But it's very hard for me to let go of my songs and the only people I write for are real singers - not that she's not a real singer, but she's more of an entertainer."

The "Stupid Girls" singer then cleared up who she defines as a real singer. She said, "When I mean real singers, I mean the likes of Lauryn Hill, Faith Hill - and I'd write for Amy Winehouse, because you need serious attitude to carry off the dumb stuff I write about."

One of Pink's best selling singles, "Stupid Girls", was about starlets using sex, instead of their brains, to sell themselves. Britney was once the poster girl for such marketing.

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