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Formal Dresses

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Mermaid Dress
Beyonce in Green Mermaid Gown

Singer Beyonce Knowles arrives at 'Movies Rock' A Celebration Of Music In Film in Hollywood, California.

Frederick M. Brown/Getty Images
Nothing is more vavoom than a form-fitting mermaid formal. It hugs your curves and then flares out at the bottom to make you look more visually balanced, like this super sexy green dress does on Beyonce.

Remember: for dresses this sleek, you'll need top-notch undergarments like Spanx for support.

Compare PricesMore mermaid dresses.

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