LAS VEGAS (AP) - Sin City is set to ring in 2014 with big-name concerts, celebrity-hosted parties and an eight-minute rooftop fireworks display billed as the nation's largest. Pop star Bruno Mars is christening the Cosmopolitan's new Chelsea Ballroom, John Legend is performing at Aria, and Maroon 5 is playing at Mandalay Bay. Other casinos are touting pricey nightclub bashes hosted by reality-TV and music celebrities, including the original celebutante, Paris Hilton. More than 330,000 tourists are expected to count down the end of the year as law enforcement officers keep the peace and casino bosses watch profits roll in. With New Year's Eve falling on a Tuesday, casinos are offering up special "New Year's Eve Eve" events on Monday.