full Academy Awards 2013 Singer actress Barbra Streisand performs onstage Oscars 2013 Singer actress Barbra Streisand performs onstage Oscars 2013 Singer actress Barbra Streisand performs onstage Oscars 2013 Singer actress Barbra Streisand performs onstage Oscars 2013 Singer actress Barbra Streisand performs onstage Oscars 2013 Singer actress Barbra Streisand performs onstage Oscars 2013