At the opening show of Chilam Cheung's concert, Chilam Crazy Hours Live 2014, he was wearing a sleeveless shirt and performed with a group of sexy female dancers.
According to an article in Asian Pop News, one of the dancers ripped off his shirt and revealed his toned body and six-pack abs.
When fans screamed for him to remove his shirt, her said: "I have already taken it off! What more do you guys want? I have not eaten for a few months.
"I just saw my enemy just now -- my fitness trainer. I don't wish to see him again!"
Chilam also invited his good friend, Nick Cheung, to be a guest performer at the show.
Both stars share the same fitness trainer and began to sarcastically badmouth him.
Chilam said: "I was like the slave who was tortured in the film, 12 Years A Slave.
"The devilish trainer kept asking me to carry on training when I couldn't anymore."