Designer Minnie Mortimer spent her formative years hopping between Manhattan, Southampton, and Paris, and she’s got an eponymous, cult-loved clothing line to prove it. Today, she launches an online sale of wares that keep Upper East Side New Yorkers and Angelenos alike coming back for more each season. What: Tartan peplum bustiers, nautical striped maxi dresses and tees, sailor shorts, and simple sheaths (reg. $48-$220) are going for 60 to 80 percent off. Why: It’s anything but gossip, girls. When: Today-July 26. Where: Online at minniemortimer.com.