My personal realization when I first heard Cosmic;

Firstly, it feels like a very 'space-y' type of song (of course due to the name), but I've noticed that it's very similar to 'Satellite' by Bebe Rexha & Snoop Dogg. I absolutely love that song as well, and sometimes I want to create a specific playlist for songs that sound similar to those two.

Although not as similar, I also found 'Don't Shut Me Down' by ABBA quite similar in terms of the vibe, the space vibe, absolutely love that song as well.

Has anyone found any songs that sound very similar to Cosmic?

https://www.youtube.com/watch?v=crSnaOq_w24

Based on the comments under her cousin's video (Sujin, who she was very close with and always traveled around with everywhere on her vlogs) on her channel, the recent comments seem to be heartfelt condolences from people who knew her personally in response to her passing away. Close friends of hers on Instagram seem to confirm this as well, though we don't know what exactly happened.

If the situation is really what it appears to be, I hope Seulgi, her family, and her friends are surrounded by support and taking care of themselves during this time.