Twenty years after the original, the sequel to "The Devil Wears Prada" made a splash in its first weekend in theaters. Driven largely by women, "The Devil Wears Prada 2" earned $77 million in the U.S. and Canada, and $156.6 million internationally, according to studio estimates Sunday. It easily topped the box office and bumped "Michael" to second place, though the musical biopic held well in its second weekend, falling only 44%. The Walt Disney Co.'s 20th Century Studios opened "The Devil