Sorry to disappoint u all....

I don't know who your official sources are - but Here is a link to the synopsis of "Alfie" on wikipedia.

http://en.wikipedia.org/wiki/Alfie_%282004_film%29

A man with too many women in his life at the same time is confronted with everything falling apart as well as a possible life threatening disease leading to an epiphany.

I doubt if this is the story of "Bachna Ae Haseeno". It definitely doesn't seem like it.

It sounds more like "Definitely, Maybe." This movie was about a man who is telling his daughter about how he met her mother. The story is about his falling into love with 3 different women, and the daughter has to guess which one her mother is. Besides the daughter part, it's the same story! As usual, Indian movie makers have a hard time creating an original thought. Although I will say the music is great!