Jessie J, Five, JLS, Alexandra Burke, Heather Small, Tulisa, The Wanted 2.0, Liberty X and many more are also on the bill
He'll be joining the UK and European tour of musical 'The War Of The Worlds'
"I'm just not going to be well enough in time," the singer explained following his second operation
"I was told I needed a second operation I was nervous, as pulling the pacemaker wires out of the heart wall risks bleeding on the heart"
The singer had a pacemaker fitted over the Christmas period
He had a pacemaker fitted over the Christmas period
George had a pacemaker fitted last week after being admitted to hospital for a heart condition
"This is the best Christmas present I could have ever wished for"
He told fans that he may require a pacemaker
"I count myself very lucky that this was caught when it was"
TW