Singer Michael Ball has been accused of ruining Susan Boyle's return to Britain's Got Talent .
The pair were performing on the live final of the talent show, that saw Chelsea pensioner
Ten years after she was crowned the runner-up in 2009, Susan was joined on stage by Michael to sing The Greatest Showman song A Million Dreams.
The pair teamed up in celebration of her ten-year career to record the track, but viewers criticised the live performance suggesting that they'd never rehearsed together before.
"Watching BGT @SusanBoyle is amazing!! No idea what key @mrmichaelball thinks that song was played in! He actually ruined that performance!" one angry Twitter user wrote.
Another said: "Have @mrmichaelball and @SusanBoyle ever rehearsed together? Awful. They still got a standing ovation from the sycophantic judges."
"@BGT what a shame @mrmichaelball didn’t compliment your performance @SusanBoyle!! No need for a duet here Michael! All for people taking an opportunity - but that was shamelessly woeful," one fumed.
"Why do Susan Boyle and Michael Ball sound like they didn’t rehearse? They look so uncomfortable there. Not a good song choice for their voice...painful to listen to," added another.
One said: "Susan Boyle and Michael Ball have just absolutely destroyed that song."
