Rodriguez was expected to join other Cuban and Venezuelan musicians Saturday for the event, which coincides with a large street rally marking Chavez's 1998 presidential win.
Chavez, who was re-elected in 2000, invited Rodriguez for the festivities.
"I'm here because I believe in revolutionary processes," said Rodriguez, whose songs of love and social justice have won over fans throughout Latin America.
"There have been difficulties, but it must be given a vote of confidence," Rodriguez said at a news conference Friday.
Opponents of Chavez are seeking a recall referendum on his term next year.
Musicians specializing in trovas - songs focusing on social problems that often recall U.S. protest tunes of the 1960s - will join Rodriguez at the concert. [End]
Chavez claims the opposition resorted to fraud during the recent drive to collect signatures for a presidential recall vote that would be held next year. On Sunday, Chavez vowed to personally review every signature - by some estimates, more than 3 million - and said he would reject any that he considers fake, even if the National Elections Council decides they are legitimate. "I would lay the bat down at home plate and say 'There's no game,'" Chavez said. "They must convince me, signature by signature ... for there to be a game."
Opposition leaders claim at least 3.6 million people signed the presidential recall petition - well above the 2.4 million needed to trigger a vote. They plan to turn in the signatures by next week. The elections council would then have 30 days to verify the petitions and decide whether to authorize a vote. ***