Bon Jovi have entertained tens of thousands of fans at a free concert in New York's Central Park.City officials gave away 60,000 tickets for the gig held on the park's Great Lawn, but demand was so high they were reportedly fetching up to $1,500 (£757.46) on eBay.Hundreds of fans lined up early to get into the concert before the show's 8pm start.The New Jersey rockers opened with Livin' on a Prayer and belted out their classics including Born to be my Baby, Lost Highway and Runaway.The show was billed as a prelude to the Major League Baseball All-Star game at Yankee Stadium on July 15. It will mark the final season at the Bronx ballpark as a new stadium is being built.The band joins other stars who have performed on the Great Lawn, including Paul Simon, Barbra Streisand and Pope John Paul II.