Barbra Streisand's singular style comes from years of studying music's greatest stars up close. Fanny Brice's outrageous vaudeville, Edith Piaf's stormy tours de force, Frank Sinatra's sly seduction, Laura Nyro's soulful breeziness, and Stephen Sondheim's precise songcraft were all admired by Streisand as she evolved into one of pop's premier song stylists.