I don't get why people keep saying that it seems like Mariah is the featured artist. It's a DUET. That's why the single cover says "Mariah Carey & Miguel" instead of "Mariah Carey ft. Miguel." The structure of the song is more like a duet than a lead-feature. In most male-female duets, the male starts off the song.
Mariah sings just as long as Miguel. It just seems like Miguel has more time because he starts off the song.
Also, isn't the hash tag thing due to the lyrics being "F**kin' Beautiful" in the explicit version? I don't think they did it to be "hip" lmao