The Astrology Place profiled her, focusing on her Sun sq Jupiter aspect...
http://theastrologyplace.blogspot.com/2013/09/ariana-grande-sweetest-baby-girl-in.html#.U2YfxPldXEs I'm not sure about this Lolita look she has going on either. Kind of creepy? (But then, when I was growing up, Britney and Christina were sexualized--but I think it was not as creepy since they were very upfront and direct about their sexuality and it felt as if they were controlling their images)
Looking at her placements.....
Sun/Mercury in Cancer
Moon conjunct jupiter in libra
Venus in taurus, trine neptune...
Pleasure and comfort seeking individual.....do what feels good all the time! All about the senses, beauty, nurturing...the arts, perhaps a little emotional excess in terms of not having limits (food, drink, good times) because of a love of comfort, very dreamy.
You know, people always say you have to have fire to be a pop star--maybe a"star" but as far as being an innovator or making good music, you need focus (earth/Taurus/venus) or have a pleasing personality, one that people can relate to (water/neptune) or project their fantasies onto.
Also, I find that pluto placements are good for affecting the masses.....very magnetic and intriguing personality...some people's music taps into the collective feelings of a group...and a strong pluto can help bring light to interesting topics