Mere Brother Ki Dulhan

Mere Brother Ki Dulhan is a comedy starring Imran Khan, Katrina Kaif and Ali Zafar. The title means "My Brother's Bride" which should give you an idea of what the story is about. http://www.imdb.com/title/tt1740710/

It's a funny film but the reason I brought it up today is because I was wondering why the title says Mere Brother and not Mera Brother, brother being a masculine word.

Apparently  the postposition ki requires that the preceding noun is in the oblique case.

http://www.unilang.org/course.php?res=69&id=hindi_0&pagenum=7
http://www.learning-hindi.com/post/1116750602/lesson-48-nouns-in-the-oblique-case
http://www.learning-hindi.com/post/1133921729/lesson-50-postpositions

Video of the title song of the film:
http://www.youtube.com/watch?v=WOPkZVo75BQ&list=PL2A4FF9A42E16D557&index=4&feature=plpp_video
Lyrics here: http://www.lyricsmasti.com/song/7612/get_lyrics_of_Mere-Brother-Ki-Dulhan.html

Here is a video version with the lyrics and English subtitles embedded:
http://www.youtube.com/watch?v=8I888XFqjBY

I find myself learning quite a lot from songs and even if not I like the song :)

Video with other songs from the movie:
http://www.youtube.com/watch?v=bWunWrE_IvQ&list=LPoqqxm_nzMAw&index=8&feature=plcp