Some 7,000 people showed up to watch Bruce Willis and his blues band perform at the Kennedy Space Center's rocket garden in Cape Canaveral, Fla.
Fans cheered as Willis sang and played the harmonica, filling the moments between songs by bantering with the crowd.
"We love playing for you," Willis said at Thursday night's show. "Even when it's hot."
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The 52-year-old actor starred in the 1998 sci-fi movie "Armageddon," which was shown on a giant inflatable screen across the lawn from the stage after the concert.