Billie Eilish talked about how people judge based on what you looked like as a teenager during her opening monologue at "Saturday Night Live" and shared a throwback photo of SNL co-host and Scarlett Johansson's husband, Colin Jost.

The 19-year-old singer, who appeared on "SNL" over the weekend, noted how it is unfair to label someone forever based on what they said or did at a particular age.

The official Twitter handle of the show shared the monologue's clip on Sunday. In the four-minute, 24 seconds video, the singer appeared in a red and white baby doll outfit and called herself "Mrs. Claus."

"People just decide that everything you say, and do, and look like, is who you are forever. It's not fair," she explained. "Would you want to be judged by the way you presented yourself when you were 16?"

Jost's photo appeared on the screen and the singer said, "Imagine being current-day Colin Jost and the first thing that comes up when you Google yourself is 16-year-old Colin Jost."

"Yikes," the singer said looking at the photo with a laugh. She pointed a finger at the photo and said, "Seen here watching other people go to prom."

Netizens took to the comments section to share their reactions.

One of the users noted that the writing was so bad that they began to feel bad for the guests while another user agreed and wrote, "Was thinking the same. Wasn’t sure if I was crazy from the comments on here. People think it’s funny. I don’t understand. It’s so lazy."

However, some fans praised the singer in the comments.

Besides Jost, she also poked fun at herself and noted that she will become a "middle-aged" person soon as she will turn 20 this weekend on Dec. 18.

"Not only do I love Christmas, but my birthday is one week from today," she said. "I am turning 20, or as the internet calls that: middle-aged."

This is not the first time for the Grammy award winner appears on "SNL." Eilish made her first appearance on the show as a musical guest in September 2019 with actor Woody Harrelson as the host.

On the work front, Eilish dropped her new music video, "Male Fantasy" on Dec. 6.

Billie Eilish with Fender Ukulele
Billie Eilish plays Fenders Billie Eilish Signature Ukulele in a promotional photo. Fender