Friends of the Year 11 St Patrick’s College pupil had started the #littlemixforjack social media campaign to ask the band to dedicate a song to him as he had been looking forward to attending the concert before his sudden death.
A friend posted: “For even little mix to mention his name or dedicate a song to him he would be so happy and overjoyed. So we all thought that we would try our best to try and get them to even notice him.”
They were given hope last month when singer Jesy Nelson posted on social media promising to pay tribute to Jack.
She said: “What was his favourite song we will make this happen don't you worry my little lovelys xxx”
Their first Belfast show was cancelled last month after Jesy fell ill but they appeared at the SSE arena for two shows on Tuesday and are due to play a rescheduled gig in July.
As the show came to an end, the band paused before performing Jack’s favourite song Black Magic to remember him.
Jade Thirwall said: “We’d like to dedicate tonight's performance and the last song to an incredible boy mixer called Jack. Our thoughts are with his family and friends and we feel very lucky that we have had such a supportive mixer from Belfast. Jack, this is for you.”
Friends took to social to thank the band for their support. One said: “So glad this happened! We truly have the best girls ever”
Another friend said: “I was there at the concert and I started crying it was sooo touching so glad she did it”
Following Jack’s death, headteacher at St Patrick’s College Paula Stewart said: "It was with much shock and disbelief that we learned this morning that Jack Whyte, a Year 11 student in our school, had died suddenly from an asthma attack.
"Jack was such a popular student and everyone at St Patrick's College is devastated and very saddened by this news.
"Jack was a bright, outgoing student, kind and caring. He was a pleasure to teach. A 'star' in our eyes. He was involved in many aspects of college life - drama, music and the student council - and he always had a smile for everyone he met.
"He will be greatly missed and remembered fondly by everyone who knew him. It will take us some time as a school community to come to terms with this. Our thoughts and prayers are with Jack's family and friends at this very sad time in their lives. Rest in peace Jack."