Feeling Excluded
Girls enjoy taking selfies, especially in the restroom. So these girls were taking 1,000,000,000 selfies and then uploading none of them. What they didn't notice was someone standing outside in the bathroom's dark hallway. They appear to be having a good time, but they failed to include the girl, which explains why she is staring at them creepily while standing there in the dark. They could have easily included her in their group selfie, by the way.
What on Earth is she thinking?
You are self-assured, yet someone walks along and makes you wish you had a certain feature that they have, right? It is completely acceptable to feel this way. Rihanna was supposedly envious of her fellow artist and rapper Nicki Minaj. We don't know for sure (after all, it is Rihanna), but it appears so. Let's just say RiRi was considering what Nicki was wearing.