George Michael is "overwhelmed" with guilt about having to cancel his concert last night (26.10.11).
The 'Faith' singer pulled out of his second Symphonica: The Orchestral Tour show at London's Royal Albert Hall because of back problems, a viral infection and high temperature, but has today (27.10.11) vowed to make things up to his fans.
In a series of tweets he wrote: "London, I am truly sorry about last night, but I had performed on Tuesday with my back in spasm and a splitting headache.... (sic)
"Without a doubt the most difficult show of my life, but London you were wonderful to me
"And I don't want to spoil the presses fun but I threw my back out rather than throwing too many burgers in my mouth :) (sic)
"Have no doubt, I will reschedule last nights show, please keep those tickets (sic).
"I've worked through colds before on tour because it's such a horrific thought that people turn up and are turned away.
"The guilt is overwhelming, but this time I had absolutely no choice. Was feverish yesterday but feeling better today (sic).
The singer issued a statement last night about having to cancel the show - his second, after the opening night on Tuesday (25.10.11) - which sees him perform hits from across his career backed by a 41-piece orchestra.
His spokesperson said: "George is disappointed that he cannot perform tonight's concert, but he has been advised to rest. He received a tremendous reaction from the audience last night and is very sorry that he has had to postpone."
The 48-year-old musician is due to perform again at the Royal Albert Hall on Friday (28.10.11) and Saturday (29.10.11).
He added: "I'm sure I'll be fine for tomorrow and Saturday. And hopefully a bit funnier :) it's not easy to ad lib when you feel like death :)) (sic)."
The cancelled concert will be rescheduled and all original tickets will remain valid.