Lena Dunham Vs. Jimmy Fallon and Challenges Kendall and Kylie Jenner

Lena Dunham took her Lip Sync Battle very seriously. Not only did she come to The Tonight Show with Jimmy Fallon and challenged him to the battle, she also consulted a friend who's a choreographer to check out her dance moves prior to battle.

After Lena explained she loves the TV Show Lip Sync Battle, which Jimmy Fallon created, she said that she had to challenge him on home base, because that's what felt right.

She also said that her ideal battle on LSB would be Kendall and Kylie Jenner, and that "They could practice as much as they want." Man, Lena, we love your sass!

Watch the battle between her and Jimmy below:

Amy Cooper is a writer and pop culture fact nerd, and on multiple occasions has been referred to as a “Walking iPod.”