The tear-jerker starring Channing Tatum and Rachel McAdams could gross between $35 million and $40 million in its debut. "The Vow" is based on the true life story of a woman who lost her memory in a car accident and had to fall in love with her husband for the second time. The film has immense buzz online, where young women have for weeks been posting messages on Twitter and Facebook about the picture and its heartthrob star Tatum.


