SHANIA LOOK MORE SEXY THAN COUNTRY.(PREVIEW)

Byline: MONIQUE FRETTO and CORRINA LESSER Staff writers The concert:

Country songstress Shania Twain, who's still the one on the Top 40 charts, struts her stuff at the Pepsi Arena Monday with Celtic-Pop music sensation, Leahy, dubbed the ``next big family act.'' The look: Shania epitomizes a new breed of country star. Gone is mile-high hair and garish makeup. Remaining is an elegant, albeit sexy style that maintains a few rustic touches from Nashville, like a cowboy (girl?) hat and soft leather vests and pants. Hey, ladies: Shania sports a buff tummy, thus midriff grazing and baring shirts are ideal. XOXO offers up a brown polyester spandex tank and wrap-around …