キーラ・コサリンさんのインスタグラム写真 - (キーラ・コサリンInstagram)「introducing: the #DecemberRemix challenge! ❄️⬇️ —— I think my song would sound a whole lot better with YOU featured on it 👀 —— Singers and rappers, this is your time to shine. Write an original verse over the outro of December and post a video performing it, and I’ll repost my favorites. Good luck! —— Videos must be entered by this Friday at 10pm.」10月18日 5時46分