Michael Jackson has told fans he is angry with concert promoters for booking 50 shows in London.

The Thriller star told fans outside his Los Angeles dance studio he wanted to take his live extravaganza across the globe - and only perform a handful of gigs at the O2 arena in London.

But he didn't get his wish, and a deal was struck for Jacko's monster 50-date residency after the initial block of 10 he'd agreed to sold out.

PHOTOS: Click for pics of Michael Jackson's frightening transformation.

He claims he only learned of the extra 40 bookings when he awoke to the news one morning.

The ailing King of Pop is now panicking he's not physically strong enough to cope with the grueling schedule, insisting his small appetite makes it hard for him to perform.

After practicing his moves at the Burbank Studios, Jacko, 50, greeted devoted fans waiting outside - and blew off some steam in the process.

"Thank you for your love and support, I want you guys to know I love you very much," he said, before adding, "I don't know how I'm going to do 50 shows. I'm not a big eater - I need to put some weight on."

MORE: Click for the full story at The Sun.