Jennifer welcomes country superstar Reba McEntire to chat about the new season of "Happy's Place." Then, viral "NYC Besties" Candace Eng and Diana Prince stop by! Their friendship captured millions online, and today they share the story of their 50-year bond and how they supported each other through life's biggest milestones, including Candace's recent breast cancer journey. Later, cake decorator and previous winner of "The Great American Baking Show" Mackenzie Rubish joins Jennifer for a fun cake-decorating demonstration and shares her tips!