Talk about bumping it up! Tiered ponies with a swinging '60s vibe are making a comeback. Your key tool for crafting these cascades? Thin, grippy elastics, says Blake Lively's stylist Rod Ortega, who used Blax's snag-free holders ($4/8; smoothiestore.com). To begin, mist a comb with hairspray, like Philip B's Jet Set Control ($30; philipb.com). Starting at the crown, gather a section of hair from ear to ear. Slick back the hairline with the comb and secure locks with a band (pin a few strands of hair around the band to conceal it, says Ortega). Then section hair again below the first band, working those lower strands plus the existing tail into a second elastic. Repeat to create more tiers. After each pass, tug up on the link, he says. "This adds dimension and gives it the relaxed look you want."