Thank you cherryfizz for making this gif.
Stashed in: gifs, Reaction GIFs!, @iamlaceychabert, High Quality gifs, @cherryfizzy
From the cherryfizz album of awesome high quality Mean Girls gifs: http://imgur.com/a/ot0nG
A few more favorites are here:
Emily VanCamp in Red Dress
SHOW ME YOUR WAR FACE! LET ME HEAR YOUR WAR CRY!!!
Key and Peele DEAL WITH IT gif
Katy Perry happy dance gif