Life's a beach for Audrina Patridge -- who spent all day yesterday filming her reality show in a bikini in Los Angeles!

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The former star of "The Hills" was spotted shooting her own show yesterday with her mother and another friend, where she beat the heat by posing in a variety of skimpy bathing suits.

The show, produced by Mark Burnett, will reportedly follow Audrina and her family around Los Angeles.

When the project was announced back in October, Patridge said "I am thrilled to be working with VH1. I can't wait to begin filming and introduce the world to my amazing family."

Check out all the sexy beach shots!

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