Princess Leia's costume - by John Mollo (not bad for a guy who normally writes books on 19th century Napoleonic uniforms).
Science fiction fashion #2.
Well its not exactly Alternative fashion, but Science Fiction influences my work, so Alternative fashion often walks the romantic/fantasy side of the more mundane.
Fashion of Star Wars. I saw the first Star Wars when it came out in 1678 (yep that makes me oooold), and being a bit of a lover of historical fashion (and history) I was aware of John Mollo's work in history fashion uniforms.
Mollo was an expert in uniforms and military clothing, so George Lucas got him to design the uniforms. The uniform designs are heavily influenced by German WW2 uniforms, and helmets.
Star Wars was his first, Mollo went on to work in film costume design, including movies like Tarzan the legend of Greystoke, Air America and White Hunter, Black Heart.
More on mah man Mollo here at Wikipedia http://en.wikipedia.org/wiki/John_Mollo
Even more impressive, he didn't work on the recent Star Wars movies, so he is, in no way, not even remotely responsible for Jar Jar Binks.
Stormtrooper dressed for a bit more than snowball fights
Mollo's designs for Jabba the Hutt (originally he was cast as a humanoid type character, before they ended up with the 3 ton Jabba we know and love today)
Oh, by the way, if anyone out there reading this has only seen star wars 4, 5 and 6, whatever you do, don't see 1 2 and 3.