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Alessandra Ambrosio - Matheus Massafera Birthday Bash
It was her friend's night to shine.

But Alessandra Ambrosio, 34, was sure to stand out in her thigh-high-slit black dress as she attended her pal and stylist Matheus Massafera's birthday bash in Sao Paulo, Brazil on Wednesday.

The Victoria's Secret Angel showed off her incredible legs while posing in her asymmetrical frock. It also appeared to be semi see through.

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