When you run into the former prom queen in a Golden Corral uniform at the local CVS, it takes every last shred of thumb restraint not to send out a mass text message. But when you stumble upon a secret hideaway with discounts on top designers like Jill Stuart and DVF, a vow of silence suddenly looks pretty good. Covertly known as “triangle line triangle” (the store’s logo), Little Big Store in Coconut Grove is like a miniature Loehmann’s (minus the old ladies staring at your thong in the group dressing room). Look for denim from Seven; dresses from Diane von Furstenberg and Mandalay; skirts from Milly; pants from Da-Nang; tops from Twinkle; and plenty of beachwear by Ella Moss and Splendid. All at up to 75 percent off. Of course, the last thing you want is for this kind of info to get out to the masses. So keep it under your hat — or, rather, your thumb. Little Big Store, 3123 Commodore Plaza, Coconut Grove (305-446-2706).