Alison Krauss is a highly successful American bluegrass singer and violinist. She has achieved multiple platinum albums and won 27 Grammy Awards, making her the second woman with the most Grammys (only four Grammys behind Beyoncé). Krauss collaborated with the bluegrass band Union Station and ventured into country, gospel, and even rock music. She has also produced albums for other musicians and collaborated with Robert Plant on the album Raising Sand. Notable pieces include Down in the River to Pray from the soundtrack of the film O Brother, Where Art Thou? and the album Paper Airplane.