I Do...Knot (2009)

Sebastian is very lucky with women, going to parties and getting drunk every night. His mother asks him to change his way of life but he refuses to stop partying and meeting new women. One day, after one night of serious partying he wakes up with a beautiful woman named Alexa. He realizes he got married to her, but he can't remember anything about it. And being married is a serious problem for a man like him.