Nikki and Brie Bella took part the 12th annual Best Buddies Challenge: Heart Castle in support of Best Buddies International, a non-profit dedicated to enhancing the lives of people with intellectual disabilities. The Best Buddies Challenge includes a series of five events, including a 15-mile bike ride, taking place over two days from Carmel to Hearst Castle along California's Pacific Coast Highway. The Bellas joined Event Chair Maria Shriver's team, along with fellow celebrities Cindy Crawford, Rob Lowe, Randy Gerber, Lauren Potter, Charlotte McKinney and Barry Bonds. For more information, visit bestbuddieschallenge.org/hc.