 Also in 2008, Plant performed with bluegrass musicians at the New Orleans Jazz & Heritage Festival and Bonnaroo Music & Arts Festival.He appeared as a surprise guest during Fairport Convention's set at the 2008 Cropredy Festival, performing Led Zeppelin's "The Battle of Evermore" with Kristina Donahue as a tribute to Sandy Denny.On 8 February 2009, Plant and Krauss won Grammy Awards for Album of the Year, Record of the Year, Pop Collaboration with Vocals, Country Collaboration with Vocals, and Contemporary Folk/Americana Album.