Ryan Gosling’s partner has her own hefty bank account! According to Celebrity Net Worth, Eva Mendes, 50, is worth a whopping $20 million. The mother-of-two — who shares daughtersEsmeralda and Amada with the Barbie star — has made her money through acting, modeling and designing. The brunette beauty’s acting career began in the late 1990s when she landed a small role in Children of the Corn V: Fields of Terror and Urban Legends: Final Cut. In 2001, Mendes got her breakout role in Training Day, starring alongside Denzel Washington. She later accepted roles in 2003’s 2 Fast 2 Furious and Once Upo…