He then requested Sian sing a different tune, and she nervously adjusted the mic and said she could do it. She messed up the beginning, but Simon encouraged her to start again.
Sian then proceeded to give an outstanding performance. Afterwards, judges David Walliams, Alesha Dixon and Amanda Holden all stood up as the audience roared with applause. Simon also had a giant grin on his face.
"First of all congratulations for what you just did. Why I really liked that second song apart from the fact I love the song is that you weren't prepared for it. And it's just the fact that you were just so much more relaxed and it really felt that we were listening to who you really are. I thought it was great. Really, really, really good."
Alesha added that the performance was very moving and her children will be very proud.
"You're very lucky she signed you up because she fought for you."