High-profile covers today: Fiona Apple, Black Keys, Low

Fiona Apple covers Sharon Van Etten’s 'Love More' for Van Etten's 'Ten' anniversary reissue, adding heartbeat drums and subtle piano to the song; Low cover Bob Dylan’s 'Knockin’ on Heaven’s Door' for the Uncut compilation 'Dylan Revisited'; The Black Keys share their version of 'Crawling Kingsnake' by Big Joe Williams, from their album of Mississippi hill country blues standards 'Delta Kream', out May 14.