I have seen some comments wondering how Somi is able to do her XOXO challenge with so many idols from different agencies (ironically, she hasn't done any with TBL/YG artists, including for Dumb Dumb).
Simple. It's because she is friends or has connections with all of them.
XOXO challenge idols, so far:
LEEJUNG - Somi's main choreographer and dance teacher
JO KWON - JYP (a JYP trainee said that Somi was friendly with everyone)
CHAEYOUNG - close friends from JYP, Sixteen
RAVI - co-hosted a show together (Don’t Be Jealous)
DOYEON - IOI, Produce 101
YOOJUNG - IOI, Produce 101
NAYEON - friends from JYP, Sixteen
* I only mentioned friendships that I am sure about