HALT IT: OK, OK. It's true we're just a tad obsessed with tie-dye this season. But when pretty much everything in the shops these days is covered in ruffles, a little bit of wild-child is important. This Ella Moss halter (was $132, now $46) combines gathers and tucks, plus a tie in the back, to offer a structured but original look. Lots of other goodies are on sale at Cusp right now, too. GET IT: Cusp.com; 3030 M St. N.W. and Tysons Corner (call for availability first).