US designer of contemporary women's apparel and accessories, Bebe Stores Inc, on Tuesday posted a 6.1 per cent rise in net sales for the second quarter to $98.7 million compared to the same period last year. Same store sales for the quarter ended December 31 fell 7.9 per cent compared to the corresponding period, while net earnings for the second quarter were $12.3m, compared to $11.9m.