Blue Crush indeed!

In the past, Kate Bosworth has been called out for her pin thin frame, but the Superman Returns star, 28, showed off a sexy, healthier look in Cancun, Mexico Monday.

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Accompanied by a female friend (not boyfriend Alexander Skarsgard), Boswroth splashed around on the beach in a bright yellow bikini. Earlier in the week, she set hearts racing when she sunned topless.

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The actress has talked before about how she tends to loose weight during times of stress.

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"Whenever anything happens that's very painful or stressful, we all lose weight -- my mother, my aunt, my grandmother," she told Vogue.

Looks like Bosworth is a happy girl!

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