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Jessica Alba may be one of those moms who snapped back into killer shape just months after giving birth, but for some reason the mom to Honor, 2, felt a little self conscious on the set of a sexy photo shoot in Los Angeles yesterday, wearing a big men's button-down to cover up her hot bikini bod!

At least we got a little sneak peek at the sexy retro bustier top she was sporting for the shoot.

Can't wait to see the final result!