From what I can gather from concerts performed at other venues, the boy sings solo for 'Alice's Theme' from Alice in Wonderland towards the end of the concert. The enthusiastic audience gives standing ovations & loud cheers.
http://www.theupcoming.co.uk/2014/12/13 ... bert-hall/Rounded off with a centre-stage performance of Alice in Wonderland by a young soprano, it’s clear that Elfman has earned his place in the hearts of many as one of the greatest film score composers of the age. Simply mesmerising.
http://www.renegade-revolution.com/meeting-idol/...I had been enjoying the fabulous solo singing of Alessandro MacKinnon of “Libera” fame
unfortunately cannot find any recording of Alessandro's actual performance but it like the one sung by this boy shown at 23:43
...all in all congratulations to Alessandro for being involved in this exclusive concert.
some more pictures here