Ming Pao Daily News said Chan suddenly jumped on stage at the concert Monday night and demanded a duet with Lee. He then tried to conduct the band but stopped and restarted the music several times, Ming Pao said.
As the awkward interruption dragged on, audience members started to heckle Chan and the actor replied with an insult, according to the report.
The newspaper quoted Chan as saying on stage that he was drunk.
Chan was an invited performing guest at Lee's earlier show Sunday night.
A spokesman for Chan, Solon So, said he hadn't seen Chan since the alleged incident and had no immediate comment. He said he didn't attend the concert.
Concert organizers didn't immediately return a reporter's call seeking comment.