8. Lena Dunham
Dunham has cornered the market on skewering white girl problems. Girls just began its second season on HBO, and Dunham, 26, knows how to turn the most embarrassing parts of being young and adrift into essential TV. She's sly enough to know she's not speaking for everyone ("I may be the voice of my generation. Or at least a voice, of a generation," her character Hannah says in Girls' first episode), but for those who've escaped their twenties intact, the bad sex, flighty friends, and dead-end jobs on Girls are too painful to do anything but laugh at.