Zac Posen’s New York Fashion Week show was accompanied by music from Mark Ronson.

The fashion designer showed his Spring/Summer ‘10 collection at The Altman Building at 9am, after being forced to move his showcase from its usual evening slot. Undeterred by the early hour, Zac had the building transformed into a nightclub, complete with curving runway, low lights, and music from the renowned super-producer.

The clothes were created from an eye-popping pallet of pink, orange, lime, fuschia and cobalt, often mixed and matched to form clashing combinations. Off-the-shoulder dresses with pleated skirts, ‘60s-style macs, sweater dresses, and knitted maxi-dresses all made an appearance. Jackets with structured shoulders were also a big look, along with draped trousers which emphasized hips.

The finale, witnessed by celebrity stylist Rachel Zoe, included a series of beautifully-made evening gowns in black, cobalt, and silver mesh, with some boasting sequins.