LOL, I've seen this flick at least three times and am cluless till now!
Mulholland Drive (2001)
is a surrealistic vision of Hollywood directed b y David Lynch and starring Naomi Watts and Laura Helena Harring. Lynch won the Prix de la mise en scene (Best Director Award) at the Cannes Festival and was later nominated for an Oscar for the movie. Many critics rank Mulholland Drive as one of Lynch’s greatest movies alongside Eraserhead (1977) and Blue Velvet (1986).
The movie’s meaning is open to interpretation with Lynch refusing to offer any explanation of his intentions for the narrative. The basic plot - Diane Selwyn is a struggling actress in Hollywood but excepting the first shots of the movie the first half of the film is shot from the perspective of Diane’s dreaming. She dreams that she is Betty, a charming, idealistic but heady young woman who is just arriving to Hollywood with a pounding heart and lofty dreams. She meets and falls in love with pretty but needy Rita and wows studio executives with her fabulous acting skills. However, when Diane awakens from her dream, we realise that her real life is far from rosy - she is reeling from the break-up of her relationship to the successful actress Camilla and is at the beginnings of a mental breakdown.
Diane hires a hit-man to do away with Camilla as we are shown the course of their relationship through a series of non-linear flashbacks. Lynch wanted people to derive their own interpretations of what the movie meant, but with the movie becoming a financial disaster he was forced by the production company to release ten clues to the public as to what the plot was about. He provided them but there is some debate as to whether the clues are completely honest or slightly misleading.
Article Source: http://www.articlesbase.com/movies-articles/what-the-hell-is-going-on-in-mulholland-drive-768566.html