What are some good books for women in there 20's?

see i like reading books about fictional stuff,like confessions of a shopaholc..i havent read any of those books but im planning on it,ive rread everyone worth knowing, and bergdorf blondes.i like reading books that are abotu glitz and glamour and love,and humor..ive looked up soem but theres so many i dont know what to choose..please let me know of some good books i can read for fun..thanks!