Who Is "A" on Pretty Little Liars? Meet Our Top 12 Suspects

Why It's Possible:

• Hanna is the closest friend to Mona before we find out Mona's the original "A."
• Hanna's the only one who stands by Mona's side after the reveal. Plus, she spends a LOT of time in Radley visiting Mona.
• Hanna had a lot to gain from Alison's disappearance. She lost weight, changed her style, and effectively became the new It girl once Ali was gone.
• She's pretty good with technology. She's hacked Caleb's computer before, and she wouldn't be caught dead without her phone.

Why It's Not Possible:

• We've heard of self-sabotage and playing the victim, but Hanna got hit by a car in season one.
• Hanna's always kind of been the admittedly ditzy girl on the show, so it's hard to believe she could pull something like this off.