BLACKPINK's Rosé melted fans' hearts with another sweet interaction on social media.

A fan recently shared a now-viral baby cam video capturing their baby wide awake, dancing and singing along to Rosé and Bruno Mars' chart-topping hit, "APT," instead of settling down to sleep.

Rosé, who came across the video, couldn’t help but comment on it, writing, "Oh my, I’m so sorry (mother)…" in a humorous and lighthearted apology.

The baby’s mom was overjoyed that the global star commented on her post, replying, "Oh wow, Ms. Rosé... It’s such an honor that you saw this video! Thank you for making a song that even a baby can’t resist. My baby's a successful fan. I’ll keep sharing videos of him as he grows up!"

Other fans quickly noticed Rosé’s comment and shared their reactions in an online community. Many couldn’t help but gush over how adorable both the baby and Rosé were. They commented:

"This video popped up on my feed too."

"Rosé seems genuinely surprised. Lol. So hilarious."

"So cute! lol."

"The baby and Rosé are both so adorable."

"The baby is super cute."

"This is so hilarious."

"This whole situation is so funny and so loveable."

"I think it's so funny how the mom posted the video too."

"It's so funny how the baby just sings 'APT' randomly at night."

"This is the cutest video I've seen this year."

"This is so funny. I can't stop watching it."

"Rosé is so cute too!!"

"I can't believe Rosé commented too!"

SEE ALSO: BLACKPINK's 'Shut Down' dance performance video exceeds 200 million YouTube views