( CNN ) -- The often scathing critic Simon Cowell called Susan Boyle -- the breakout singing sensation from `` Britain 's Got Talent '' -- a `` little tiger . '' Judge Piers Morgan admits that he expected Susan Boyle 's audition to be a joke before she began singing . On CNN 's `` Larry King Live , '' she showed she 's no one-trick pony . During a taping of the show Friday , she nailed a verse of Celine Dion 's `` My Heart Will Go On '' after King asked her to sing . `` Amazing . That was just absolutely stunning , '' said `` Britain 's Got Talent '' judge Piers Morgan , who was also a guest . `` To sing that with no musical backing is unbelievable . You have the voice of an angel , Susan . '' The 47-year-old Boyle 's frumpy attire and awkward mannerisms drew snickers and eye-rolling from her audience before she belted out a pitch-perfect number from `` Les Miserables '' at an audition for the talent contest , making her an overnight sensation . Watch Boyle sing on Larry King » . An unemployed charity worker who lives alone with her cat in Scotland , Boyle has inspired millions with a performance that flies in the face of pop music 's penchant for pre-processed princesses . A clip of her audition had more than 19 million views on YouTube by Friday evening . Boyle , who did a repeat performance of `` I Dreamed a Dream '' via satellite on CNN 's `` Anderson Cooper 360 '' Thursday night , told King she was aware of the snickers her appearance prompted at the audition . `` That does n't bother me because I knew I had to get on with my act ... , '' said Boyle , again speaking by satellite . `` I was n't sure how I would be received , so I just thought I 'd give it a whirl . '' Watch Larry King interview Susan Boyle » . Morgan , too , acknowledged the laughter , including his own . `` I sort of feel like apologizing to Susan , '' he said . `` I 'm sorry , because we did not give you anything like the respect we should have done when you first came out . '' He said the judges had been through a long day with `` lots of terrible auditions . '' `` And then you came out and we thought you were going to be a bit of a joke act , to be honest with you , '' he said . `` And then I can remember ... that second when you had begun to sing , and I had never heard a more surprising , extraordinary voice coming out of somebody so unexpected . '' To win the show , which would give her the chance to sing in front of Queen Elizabeth II , Boyle must survive a live semifinal next month and then a final performance if she gets through that . Watch how things have changed in Boyle 's hometown » . `` She 's the most odds-on favorite ever on 'Britain 's Got Talent ' at this stage of the competition , '' Morgan said . `` But Susan knows there are two big hurdles left . Anything can happen in a live show . '' There 's already been talk of a recording contract and world tours for Boyle . But she said she 's staying focused on the competition for now . She said she has no plans to get a makeover or alter her wardrobe -- `` Why should I ? Why should I change ? '' -- but did predict one big lifestyle change . `` I wo n't be lonely , '' she said . `` I certainly wo n't be lonely anymore . ''
Susan Boyle sings in Dion 's ` ` My Heart Will Go On '' for Larry King . Asked if she 's getting a makeover , Boyle says ` ` Why should I change ? '' ` ` America 's Got Talent '' judge Piers Morgan apologizes for initial reactions . Boyle says she predicts one big change : ` ` I certainly ' n't be lonely anymore ''