The group was performing at PPG Paints Arena Wednesday night when Jon Bon Jovi told the audience he has had a cold since Saturday night. But he said he would keep pushing on.
The Pittsburgh Post-Gazette reports he also said: "This is the day when I need a karaoke singer. Which one of you guys in a bar band knows all the words to Bon Jovi songs?"
He sang "Bad Medicine" and wrapped things up after 90 minutes of the expected two-and-a-half hour show with "Livin' on a Prayer."
The band is scheduled to play New York's Madison Square Garden on Friday.
Bon Jovi performed in Philadelphia last Friday at the Wells Fargo Center.
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Information from: Pittsburgh Post-Gazette, http://www.post-gazette.com
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