13/09/2010 15:49 BST | Updated 22/05/2015 10:12 BST

New York Fashion Week: Day Three

Yesterday may have marked a sombre anniversary for New Yorkers, but designers showed that for spring, optimism is in the air. What does happy dressing look like? A return to the light (and the brights)...

Altuzarra, Prabal Gurung,Alexander Wang, Z Spoke. Photos: Getty, AP

Pretty pythons: Joseph Altuzarra has quickly become a cult favourite and this season he took on a bevy of references (from the 60s to techno culture) for his sleek spring/summer 2011 collection. Snakeskin reigned supreme - from jackets and bandeau bras to patchwork accents on tops and dresses. And those into brightly coloured, streaky hair will be pleased that neon Crayola patches - in hues like blue, green and red - were painted into the hairline.

Let there be white: What will the hippest girls be wearing this spring? Not black, for once, since Alexander Wang's abandoned his colour of choice next season, instead creating a collection focused on purity and optimism. There was a construction motif running throughout (a reaction to Wang's new apartment and store opening), evidenced by overalls, carpenter trousers, metallic slashes of duct tape-like detailing and white paint streaks in hair.

See you later, alligator: Lacoste's Christophe Lemaire delivered his final collection of tennis whites and trendy polos for the label yesterday. The designer's leaving the tennis world behind for the equestrian circuit, taking up the reins at Hermès.

Colour me beautiful: Looking for an attention-grabbing frock that gets you noticed in a good way? Prabal Gurung's colour-blocked looks in turquoise, poppy red and yellow scream optimism for spring. The final touch? A pair of strappy heels from Nicholas Kirkwood, the result of Gurung's first collaboration with the footwear designer.

Celeb watch: Maggie Gyllenhaal was spotted front row at Alexander Wang along with singers M.I.A. and Lenny Kravitz. At the runway debut of Zac Posen's more affordable line, Z Spoke, Claire Danes, Estelle and The Hills' Kristin Cavallari all took in the playful looks like kooky party dresses, trousers and tops printed with faces and fruit and rainbow eye makeup from their front-row perches.