belfies
photo: Instagram

Instagram was obsessed with the "belfie" (aka the "butt selfie") in 2016. 

That's right — this year's selfie trend was not limited only to the face. Countless celebrities turned around, stuck out their behinds, and somehow wound up with effortlessly perfect (and bootylicious) Instagram posts. 

Here are 18 of the best celeb and Instagram influencer belfies of 2016:

1

Demi Lovato posted this belfie to promote her single "Body Say."

belfie
photo: Instagram/@ddlovato

Demi had a spontaneous nude photo shoot for Vanity Fair last fall, which spearheaded her belfie addiction in 2016. 

2

Chelsea Handler used her belfie to make a political statement.

belfie
photo: Instagram/@chelseahandler

Her ass reads, "Trump is a butt hole."

3

Ariel Winter got cheeky all summer long.

belfie
photo: Instagram/@arielwinter

The body-positive teen loved to show off her curves (namely, her booty!) in naked shorts.

4

Dascha Polanco took a belfie in a naked bodysuit.

Dascha's naked looks are always on point.

5

Rihanna mastered the art of the butt selfie.

belfie
photo: Instagram/@badgalriri

She captioned this Instagram shot of her backside, "Made in Barbados."

6

Model Denise Bidot gave our feeds double the belfie.

belfie
photo: Instagram/@denisebidot

But her front side is pretty Insta-worthy, too: Earlier this month, Denise posted a photo showing off the stretch marks on her belly, and it went viral.

7

Before she stepped away from Instagram, Kim Kardashian was the ultimate beach BUM.

belfie
photo: Instagram/@kardas

After her traumatic Paris robbery, Kim stopped posting to social media and subsequently caused a brief belfie drought.

8

But while Kim was away, Kylie Jenner's butt came out to play.

belfie
photo: Instagram/@kyliejenner

Kylizzle clearly learned from the best. (See above)

9

There was no shame in Danielle Brooks' bathroom belfie game.

belfie
photo: Instagram/@daniebb3

Danielle is an inspiration to us all.

10

Model Tess Holliday bared all for this body-positive butt selfie.

belfie
photo: Instagram/@tessholliday

Sadly, the model spent most of 2016 having to defend her belfies against Facebook's ridiculous image policies. The social network continually banned her images for being "extremely undesirable."

11

Kendall Jenner's booty found strength in numbers.

belfie
photo: Instagram/@kendalljenner

Her butt posed with Camila MorroneLauren Perez, and Hailey Baldwin's butts for this belfie

12

Fluvia Lacerda, Playboy's first plus-size cover star, recruited a fellow plus-size model for this belfie.

belfie
photo: Instagram/@gabifresh

Playboy Brazil picked Fluvia's perfect body for its cover.

13

Iggy Azalea confirmed that she's ready to leave all of the drama ~behind~ in 2016.

belfie
photo: Instagram/@thenewclassic

Her ex-fiancé can kiss her butt. 

14

Nobody does the belfie quite like Nicki Minaj.

belfie
photo: Instagram/@nickiminaj

I mean, have you *seen* her "Anaconda" music video?

15

Good American squad member Nadia Aboulhosn promoted Khloe Kardashian's denim line with a butt selfie.

belfie
photo: Instagram/@nadiaaboulhosn

However, Khloe's jeans may or may not give you that desired Kardashian ass...

16

Amber Rose posted this belfie at her annual Slut Walk.

belfie
photo: Instagram/@amberrose

But she announced the event by tweeting a picture of her nipples.

17

Model Iskra Lawrence proved that the best butt selfies come with a little cellulite.

belfie
photo: Instagram/@iskra

Iskra will even strip on the subway for a body-pos belfie.

18

And Ashley Graham blessed our Instagram timelines with this bikini belfie.

belfie
photo: Instagram/@theashleygraham

Thanks to Ashley's recent Instagram post, the year came to an end... with a rear-end.