Bret Michaels suffered a medical emergency and was hospitalised in Nashville just hours before he was due to perform on Thursday night.
The American singer, 59, is said to have suffered a bad reaction to medication related to his diabetes and Covid-19, according to TMZ.
Speaking in a statement shared to social media on Friday morning, Bret apologised to fans for not being able to "rock the stage" and was working on "being back soon".