The four-disc box set called the Acoustic Collection: 1999-2002 assembles the three albums Dolly Parton cut for the independent Sugar Hill label, and a hodgepodge bonus DVD. The albums – The Grass Is Blue, Little Sparrow, Halos & Horns – were all critically acclaimed as they signified a return by Parton to her bluegrass and backwoods country roots. That said, there are cover versions here of many songs, including one of Led Zeppelin's infamous, ubiquitous hit, "Stairway to Heaven." The enclosed DVD features five new song mixes for "Seven Bridges Road," "Travelin' Prayer," "Train, Train," "Shine," and "I'm Gone." There are two non-Parton performances recorded at the Dolly Parton Tribute by Kasey Chambers and Sinéad O'Connor, three videos for songs from this collection, and a duet performance between Parton and Norah Jones singing "The Grass Is Blue."