On December 28 episode of tvN's talk show 'Amazing Saturday', Hyeri and ROSÉ showed off their rock-solid friendship.

ROSÉ answered, "Ah Yes, it did indeed. Actually, Hyeri asked me for my number. I was really nervous in front of her, because not only was I a huge fan of her, but she also has many more years of experience in this field that I do."
She continued, "When she came up to me and asked me for my number, my heart almost skipped a beat. I was really touched as well."

ROSÉ responded, "We sure do. She asked me for my number before I did, but I asked her to hang out together first. We usually see one another about twice a week."
Hyeri shyly laughed and added, "When we can't find time to meet up, we would generally video call each other."

(SBS Star)