BRISBANE, Calif.--(BUSINESS WIRE)--bebe stores, inc. (NASDAQ:BEBE) today announced preliminary comparable store sales results for the fiscal second quarter ended January 3, 2015, and updated its net loss per share guidance for the quarter. Comparable store sales for the quarter ended January 3, 2015 increased approximately 8%, ahead of the Company’s expectations, with positive performance across all regions. This increase was driven by improved sell through of the fall and holiday product offer