If you’re asking “why” then you’ve come to the wrong place, because we don’t have an answer for you. I don’t know why Ariana Grande decided to record a video of herself kissing Elizabeth Gillies and I don’t know why she uploaded it to Instagram. The obvious answer would be “Omg I need more Insta followerz u guise!!!” and to be honest, that probably is the answer — but I can’t say that for sure.
So for now, just watch the video and then move on with your life. Or play it on repeat. Idgaf.