Ok so total chick book, but it's one of the best selling books of all time:
Valley of the Dolls
Anything by David Sedaris
If you like Fantasy/celtic type shite.. My favorite Series (and really its more like 3 series) is
The Deverry Series by Katherine Kerr. It's a crappy website, but the books are so amazing, i've read some of them twice. It's about different incarnations of characters, and how their past lives effect their current/future lives and relationships with each other. And a lot of "elemental magic" type of crap. *shrug* i love it.
Also, anything by Poppy Z Brite. Like Anne Rice, but 100 times better.