“There was a full stage with lighting and effects,” one of the guests tells In Touch, adding that celebrities such as Oprah Winfrey and Vivica A. Fox attended the private party on Dec. 29 at the 63-year-old talk-show host’s Beverly Hills mansion.
Katy “rocked it – she looked amazing in a silver dress that showed off her body,” a second guest spills to the mag. “It was an amazing night. Everyone had a great time.”
For more, pick up the latest issue of In Touch, on newsstands now.