Rocker John Fogerty made a surprise appearance at the Gentlemen of the Road festival in St. Augustine, Florida on Saturday night (14Sep13) after he was called in as a last-minute replacement for fun. The former Credence Clearwater Revival frontman hopped on a midnight flight from Los Angeles on Friday (13Sep13) to fill in for the Some Nights hitmakers, who were forced to scrap their set to allow singer Nate Reuss time to rest his voice following an illness. Fogerty called on The Vaccines and his son Shane to back him up on classics like Suzie Q, Down on the Corner and Fortunate Son, and he teamed up with headliners Mumford & Sons for songs including Bad Moon Rising, Born on the Bayou and Proud Mary. Following his cross-country trek, the rock star told WENN, "Travel thousands of miles, get a couple hours' sleep, rehearse with two killer bands and play for 20,000 awesome fans with one of my personal favourites Mumford & Sons. Rock and roll... worth the trip!" Fogerty is making it a habit of performing with other bands - earlier this month (07Sep13), he played a solo set with Widespread Panic at Virginia's Lockn' Festival and he guested at a Labor Day weekend gig as part of Harley-Davidson's 110th anniversary party in Milwaukee, Wisconsin, where he performed alongside Kid Rock. Meanwhile, on 22 August (13), he was a surprise guest at Brad Paisley's show at Shoreline Amphitheater in Mountain View, California, where he and Paisley performed Hot Rod Heart, a collaboration they recorded for Fogerty's new duets album, Wrote a Song for Everyone.