Billie Eilish's Backside Gets A BIG KISS From Brother's Girlfriend In Cheeky Pic

Instagram/billieeilish

If Billie Eilish asks you to kiss her a**, you do it!

The "Therefore I Am" singer shared a very naughty picture with her brother Finneas's hot girlfriend, Claudia Sulewski on Monday. Eilish and Suleski appeared to have a really good time at Justin Bieber's New Year's Eve concert at the Waldorf Astoria, but she just now revealed her big New Year's kiss. Billie pulled up her hoodie at midnight while Claudia plucked up and planted a wet one on Billie's tight tush!

Scroll down to see the pic!

Instagram/claudiasulewski

Claudia previously shared several memories from the night but she excluded the butt pic. "our first justin bieber concert? HAPPY NEW YEAR!!!!" she captioned a silly photo series with Billie. She included a cool clip of the Biebs performing "What Do You Mean?" and a homemade sign that featured a young Justin with his iconic hairsytle.

Eilish simply captioned the butt kissing one with a cheeky ? monkey emoji and Finneas's GF followed suit, "oh!??"

Instagram/billieeilish

It's no secret that Billie's millions of sycophants worship the ground she walks on and they have even expressed their submissive demeanor by referring to her as "Daddy" in the past. Many of her followers flooded the comments section of her post and let her know that they are super jealous of the cheeky opportunity that Claudia got.

"could we switch places," a desperate fan commented, while another said, "hate to see other people living out your dreams."

A few fans thought it was funny to troll a little bit, "To all the Billie fans... YOU WISH THAT WAS YOU HUH."

Instagram/billieeilish

Fans are loving the new sense of self-confidence that Billie has been displaying on Instagram lately. Last week, she shared a cute headshot that featured her lovely lips. Before that, she blessed her fan's timelines with her long legs and unique fashion sense.

The internet went crazy for Eilish's pics but she had to set the media straight by making it clear that she doesn't use lipliner or lipstick... she's just a natural beauty!