10 Life Lessons from 'Mean Girls' Karen Smith

She might be in some of the more controversial and serious movies of recent years — Les Miserables, Lovelace, Chloe — to name a few, but even Amanda Seyfried attributes her best work to 2004's Mean Girls . And can we blame her? Portraying ditzy airhead Karen Smith, Seyfried is oddly convincing as the high school mean girl who can tell the weather by feeling her breasts (if that's not a superpower, I'm not sure what is...). Today, the actress turns 28 years old. And in an interview with Indie Wire, Seyfried said of her breakout role:

"I was so innocent. I was so green. I look back and I’m like, ‘Really, I thought I was doing a terrible job.’ But it was written so well and so wonderfully directed. [Director] Mark Waters made me look good; he made me funny. And Tina Fey wrote the coolest script of all time. I’m so grateful for every experience."

To celebrate her favorite role (and undoubtably ours) here's ten life lessons we can learn from Mean Girls' Karen Smith.

1. Incest is 100 percent acceptable, especially if that person is your first cousin.

As Smith explains, you have your cousins, your first cousins, your second cousins, and so on. So making out with your first cousin Seth Mosakowski really isn't a big deal.

2. Halloween is for wearing lingerie and some form of animal ears.

3. Good friends always apologize when they're wrong.

Karen knows that friends admit when they're wrong. "Gretchen, I'm sorry I laughed at you that time you got diarrhea at Barnes & Nobles," Smith says during a bonding exercise with the entire Junior class. "And I'm sorry for telling everyone about it... And I'm sorry for repeating it now." Atta girl!

4. It's easier to predict the weather if it's already happening.

5. It's OK to ask logical questions, even if they are somewhat racist.

6. Taco Bell will always mend a broken heart.

7. A skill is a skill, regardless of whether or not it's learned in a classroom.

8. Faking being sick to get out of hanging out with friends usually doesn't work.

Especially if your BFF is Regina George.

9. Never stop self-analyzing, because really, you're never going to be perfect.

10. Fashion has very specific and important rules.

Images: Paramount Pictures; Tumblr (10)