Jessica Alba was labeled a "sl*t" at school.

The 'Sin City' actress was an early developer and from the age of 12 she was constantly teased about her rapidly expanding chest. Recalling her time in the sixth-grade, Jessica said: "The accusation still ricochets... They think I'm a sl*t?"

The pregnant star also gave advice to young girls, telling them to enjoy life but be safe at the same time. Jessica writes in Ellyn Spragins' new book of essays, 'If I'd Known Then':

"Boys are awful. They are made of nothing but hormones until they're about 20 or 21. It's fun to have a crush, but don't think it's forever... and use birth control and condoms, please."

Jessica - who is expecting her first baby with fiance Cash Warren - recently admitted her baby wasn't planned but was a pleasant surprise.

She said: "I've always loved kids and I've always wanted kids, so this is kind of perfect."

"I feel really blessed. I feel really lucky. This is the best time ever. It's the best year."

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