Sweet Bells  Sweet Bells is the first Christmas album by English contemporary folk musician Kate Rusby, released on 15 December 2008 on Pure Records. In November 2011, Rusby released a follow-up, entitled "While Mortals Sleep" (2011). The album was re-released on 9 November 2009 featuring new cover artwork by Marie Mills. Sweet Bells, the carol featured on the album, is a carol peculiar to Yorkshire, based on the carol "While Shepherds Watched Their Flocks by Night" but with an alternative tune and extra lyrics.