There's never been a better excuse to buy a new dress... or two. The irresistible heroine of Confessions of a Shopaholic and Shopaholic Takes Manhattan is back - in a hilarious tale of mothers and daughters, mothers and sons, and one blushing bride who just can't say no to saying I do. Life has been good for Becky Bloomwood: She's become the best personal shopper at Barneys, she and her successful entrepreneurial boyfriend, Luke, are living happily in Manhattan's West Village, and her new next door neighbor is a fashion designer But with her best friend, Suze, engaged, how can Becky fail to notice that her own ring finger is bare? Not that she's been thinking of marriage (or diamonds) or any