All it takes is hearing the unbelievable high notes Boyle hits ... Boyle's greatest songs in her repertoire, as she also performed the holiday hymn for a 2010 performance of "O Holy Night," Susan ...

Susan Boyle's voice approaches heaven-like reverence on her cover of the hymn "Abide with Me." While fans love her takes on contemporary hits, one of Boyle's greatest strengths as a singer is ...

RELATED: Susan Boyle's Ethereal "Mad World" Cover Will Transport You to Tranquility While fans love her takes on contemporary hits, one of Boyle's greatest strengths as a singer is encapsulating ...