Ariel Winter celebrates in a skin-baring bikini

Hours after essentially confirming that she's single on Instagram, Ariel Winter celebrated reaching the two-million-followers mark by baring her butt in a patriotic bikini.

"2 million!!! Wow! I can't believe you guys so much," the"Modern Family" star captioned the photo of herself on the open water, steering a boat.

WATCH: Ariel Winter Rocks Burt Reynolds Crop Top and Daisy Dukes

This is the latest in a string of body-positive Instagram posts she's shared in recent days, including this ab-tastic bathroom selfie showing off her Burt Reynolds shirt:

And this on-set photo of herself in super-short shorts, posing with Hairspray star Nikki Blonsky.

WATCH: Ariel Winter Not-So-Subtly Confirms She's Single

Winter drew a lot of heat from her critics for the revealing cutout dress she wore to her recent graduation party, which showed quite of bit of the 18-year-old's underboob.

Winter later fired back at her critics and body-shamers in a powerful Twitter post, writing, "Dear sorry body-shamers, I looked HOT in that dress. And if you hate it, don't buy it. But please get a hobby. XOXO Ariel #EmbraceYourBody."

WATCH: Ariel Winter Fires Back at Body Shamers