The phrase "sparkling look" refers to a shiny and bright appearance or expression. It suggests that something or someone looks lively, radiant, and full of energy. Full definition
Encourage your beauties to come out in an outrageous dress up with sparkling looks for small girls to teens with different styles of girls wear. (g3fashion.com)
Plus, as Sandy points out, Sparkles looks like she's wearing eyeliner, so when she looks up at you, her eyes actually do sparkle (hence her name). (petliferadio.com)