SPOTTED: Katharine McPhee, Kathy Bates, Gabby Sidibe, Sean Stewart and Alana Stewart at The American Cancer Society’s 2015 Birthday Ball, held at The Beverly Hilton in Beverly Hills, CA over the weekend.

Katharine performed a special set at the event to help raise funds for The American Cancer Society. The beautiful singer/actress wore a Ronny Kobo top paired with a Paule Ka skirt. She completed her look with a pair of Stuart Weitzman shoes and a Jennifer Meyer necklace.

Enjoy some photos from the event:

Kathy Bates and Katharine McPhee attend the American Cancer Society’s Birthday Ball

Katharine McPhee attends the American Cancer Society’s Birthday Ball

Event Chair – Michael Miller and Alana Stewart accepting the honor on behalf of the Farrah Fawcett Foundation at the American Cancer Society’s Birthday Ball

Sean Stewart and Alana Stewart attend American Cancer Society’s Birthday Ball

Kathy Bates and co-star Gabby Sidibe of American Horror Story attend American Cancer Society’s Birthday Ball