Remember Sophia Grace and her little cousin Rosie?
The adorable duo became household names eight years ago after a video of them performing Nicki Minaj's hit song, "Super Bass," went viral in 2011, appearing frequently on "The Ellen DeGeneres Show" after the fact, and they just reunited in an adorable birthday Instagram post looking all grown-up.
In honor of her 13th birthday, Rosie took to Instagram to celebrate her relationship with her older cousin.
"I’ve had the best birthday weekend ever and loved spending time with my beautiful cousin @therealsophiagrace," she wrote. "Our bond will never be broke, our memories will never be forgotten and our funny little sayings and our own silly language will never get boring! Thank you for all we have shared, love you."
In the photo, Rosie wears a chic Ariana Grande hoodie and braces, while Sophia Grace dons an off-the-shoulder black top and a full face of makeup.
See more photos of Sophia Grace and Rosie through the years:
Fans were quick to notice how much older Sophia Grace looks now at the age of 16.
"Sophia looks older than she should," the top commenter wrote. "She's younger than me and she dresses way too old for herself. But that's her parents."
Other users said that she "looks straight up over 30" and asked "is it me or does Sophia look different?"
Meanwhile, Sophia Grace definitely had people defending her in the comments.
"Guys chill out. The camera flash just made the concealer (used under her eyes and around her brows in order to shape them) brighter than it seems and unfortunately comes out a bit ghostly," one follower explained. "Her makeup certainly wouldn’t have looked like that without the flash. Also, she is growing up, she is trying to find who she is and in a world where society determines what girls should look like, she is working through discovering this. Leave the poor girl alone."
Another contingent of fans were simply nostalgic for their viral moments back on "Ellen."
"Who’s been on this journey with them since there 1st appearance on Ellen?" someone asked.
This isn't the first time that the duo has made waves since their first moments in the spotlight. Earlier this year, Sophia Grace released a song, "Can't Sleep," and at the beginning of the accompanying music video, she addressed her transformation and being "different" than she was eight years ago.
"People saying they want me to be the same as I was before. It annoys me because I’m not that person anymore and they always ask me to go back to how I was, but I’m different and that’s not who I am," she says at the beginning of the clip. "So I want to show people I’m a different person now and I’ve changed, but that’s okay because everyone changes."
See more recent photos of Sophia Grace on Instagram: