Nash performed " Raise It Up " from '' August Rush '' at the 2008 Academy Awards , making her the youngest ever to perform on an Academy Awards telecast . Also at the Academy Awards , she was shown on stage playing tennis via '' Wii Sports '' with the host Jon Stewart until he noticed the crowd behind her and she ran off stage . Her latest appearance was on July 18 , 2009 , in the Kennedy Center . She sang Celine Dion 's song " Let 's Talk About Love " as a tribute for the Apollo program 's 40th anniversary
2008 Academy Awards
80th Academy Awards
Jamia Simone Nash