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Business comes first for Lisa Vanderpump.

The “Real Housewives of Beverly Hills” star and restaurateur did not make an appearance at Andy Cohen‘s baby shower on Saturday, as she was in Las Vegas working on her new lounge at Caesars Palace, an insider told Page Six.

Vanderpump Cocktail Garden is set to open early this year.

Back in California, Vanderpump’s co-star, Kyle Richards, hosted the “A Star Is Born”-themed affair at the Palm Beverly Hills, along with fellow “Housewives” veterans Ramona Singer, NeNe Leakes, Vicki Gunvalson and Teresa Giudice.

Lisa Rinna, Dorit Kemsley, Erika Jayne, Denise Richards and Teddi Mellencamp of “Beverly Hills” also attended, in addition to “Housewives” from other franchises, as well as John Mayer.

Cohen, 50, is expecting his first child, a boy, via surrogate.