Britain's Got Talent singer Alex Keirl says he found it difficult watching his audition back on Saturday night - despite doing so well with the judges.
The 20-year-old music student impressed with his version of Les Miserables song Bring Him Home, which Amanda Holden praised as "outstanding" and David Walliams called "stunning".
Alex, who was bullied at school because of his love of singing, said: "Saturday night was crazy. I remember sitting there watching it and feeling absolutely petrified. I felt sick.
"It was crazy, having friends, family round. I thought I was going to throw up."
Simon Cowell was the only judge who had one negative comment, saying that although he agreed that the performance was great, it had been pitched too high.
But Alex, who previously entered the X Factor, said: "I was pleased... Personally I didn't think it was too high because I changed the song to suit my voice."
He said he entered the ITV show after his mum told him to "go for it".
Asked about the response to his audition, he added: "I was so overwhelmed. They all stood up. It's so mad. It's crazy. I was blown away... My dad was crying, my mum was crying. They were so happy for me."