The Best of Clannad: In a Lifetime is a greatest-hits anthology album by Irish group Clannad. It was released in 2003 by BMG and its subsidiary RCA Records. It contains two new tracks, "Christmas Angels" and "What Will I Do", the latter of which was used in the soundtrack of the Kevin Costner film Message in a Bottle.[citation needed] A limited-edition version included an eight-song bonus disc, Clannad Chilled.