At the 2004 Boxing Day tsunami relief concert, WaveAid, in January 2005 the Waifs performed with Thorn providing harmonica. Thorn's song "Bridal Train" was released as a single, by the group in 2004, and the song won the USA Songwriting Competition in 2006. The Waifs' fifth studio album, "Sun, Dirt, Water" (September 2007), provided a title single, which was written by Thorn.