Salma Hayek always knows how to command attention on social media, and the star has left her fans stunned as she shared a beautiful photo.DISCOVER: Salma Hayek lives in Justin Bieber's former 17-bedroom mansion – see insideIn the throwback image, the actress dazzled as she sat with her close friend Christiane Martel and the late operatic tenor Luciano Pavarotti, who passed away in 2007.