Michael Kors seems to have captured the hearts of teen girls: 39% of average-income girls choose Kors as their preferred handbag, up from 7% in 2012, while previously beloved Coach fell from 46% to 17% in that same amount of time. Teen shoppers are a powerful and influential bunch, and they’ve brought Kors “to new highs.” However, when brands become ubiquitous, as Coach did and some think Kors could become soon, sales can slow, making room for “hard-charging upstarts” like Tory Burch and Kate Spade. (Bloomberg)