Ahead, the 15 biggest viral trends from the past 12 months.

The debate sparked a variety of #TheDress memes, and even inspired celebrities fromTaylor SwifttoKim Kardashianto weigh in.

The memes about the animals' adventure were swift and hilarious, spoofing on everything fromAmerican GothictoThelma and Louise.

2015’s Biggest Memes

swiked.tumblr.com

The costumed performerinspired memeson everything from his pained expression to his moves.

Pizza Rat

In September, a simple New York City subway rat catapulted to national fame.

Then dubbed Pizza Rat,the animal inspired memes, a Twitter account, and even Halloween costumes.

The Dress

swiked.tumblr.com

Miley, What’s Good?

Thus,#PopeBarswas born.

Twitter users provided the Pope with lyrics, attaching said bars to the image.

The Llamas

ABC15

George Glass

If You’re Reading This It’s Too Late

Twitter.com/abebabyy

Beyonce Always On Beat

Vine.co

Drake Dancing

Image

Left Shark

Christopher Polk/Getty Images

Image

Netflix and Chill

Twitter.com/Caggie_Dunlop

Prattkeeping

Instagram.com/kati_speer

Straight Outta The Internet

Instagram.com/outtacomptonmovie

Miley, What’s Good?

Kevin Winter/MTV1415/Getty Images

Pope Francis Bars

Gianluigi Guercia/AFP/Getty Images

Deflategate

Instagram.com/pearson732