In early 2011, Avett Brothers bassist Bob Crawford learned that his daughter Hallie had a seizure due to a brain tumor. He took a hiatus from the band and was temporarily replaced by Langhorne Slim bassist Paul Defiglia. Crawford returned to play with the band on the 53rd Grammy Awards in 2011, performing "Head Full of Doubt/Road Full of Promise" and then joining Mumford and Sons and Bob Dylan for a performance of "Maggie's Farm." After successful treatment at St. Jude Children's Research Hospital his daughter's condition stabilized, and he returned to the band. The band kept Defiglia as a touring member, playing organ, double bass, and keyboard.