“At Last” is a song written by Mack Gordon and Harry Warren for the musical film Sun Valley Serenade(1941). Glenn Miller and his orchestra recorded the tune several times, with a 1942 version reaching number nine on the singles chart. At the first inaugural ball for President Barack Obama on January 20, 2009, Beyoncé Knowles performed “At Last” live for the president’s and first lady’s first dance,[reprising her Grammy-winning performance of the song in the 2008 film Cadillac Records. Two weeks later, Etta James told an audience at a concert in Seattle that she was offended that Beyoncé performed “my song” for the president, despite the fact that it was written twenty years before she recorded it.