“Brat girl summer” – unpick this trends and suddenly it is obvious why so many people are sporting lime-green this season. It traces back to the colour of British singer Charli xcx’s album cover “Brat.” She sings a song, “360” with the lyrics, “If you love it, if you hate it / I don’t fucking care what you think.” That sums up the spirit of “brat summer,” namely: do what you want, no matter what other people think. The trend went viral and has hit the streets, as you can see from what people are wearing. Beyond attitude, the look is a vibe somewhere between 2000s look and indie sleaze, which e…