King of Pop might have to compromise on his voice while belting out hits, because of his multiple surgeries.
The London shows also face a recording ban, and thus concert goers cannot analyse the sound too closely. And videos of his hits could be played during the show to cover the star as he performs. The 50-year-old singer will also be protected by an army of dancers and stage pyrotechnics at the sell-out gigs at the O2 Arena.
"An issue has arisen as a result of the medical work Michael has had," the Daily Star quoted a top music promoter as saying. The promoter added: "Just making the right sounds is tough due to the surgical work. He doesn't want to disappoint fans with a second-rate performance and steps are being taken to ensure he has some back-up.