Vegas puts on some of the biggest, most outrageous and most expensive shows anywhere. And you generally pay dearly to see them. Good seats to a big time boxing match will run $1,500. Top music artist tickets can cost almost $10,000 a pair for a rare show in a small venue. So when Treasure Island Resort Casino put an almost full-scale pirate battle in a moat in front of the hotel where passersby could watch for free, they had a hit. For 10 years and more than 16,000 shows, an estimated 35 million people stopped to watch the spectacle. But nothing stays the same forever in Vegas, and when the hotel decided to sex itself up to attract more hip, young singles and couples, it changed the battle for Buccaneer Bay into the seduction of Sirens Cove. Don't fret...if you liked the old show because stuff got blown up and set on fire, it still has that. But now the battle is between a ship full of beautiful, scantily-clad temptresses and a man-o-war bearing rugged, handsome renegade pirates. They square off nightly in 15-minute pitched battles, but the show doesn't stop there. The Sirens of TI are a key part of TI's new look and attitude. Go inside after the show and you're likely to come face-to-face with the Sirens as they mingle with guests throughout the hotel. Sirens of TI, shows at 6, 8 and 10pm nightly (weather permitting); TI, 3300 Las Vegas Blvd., South; (702) 894-7111; http://www.treasureisland.com.