I made a Sergeant Pepper costume of John Lennon from the Beatles for my boyfriend for Halloween this year. It was VERY last minute. I made it and my sloth costume (you can see more of that here: http://www.craftster.org/forum/index.php?topic=441373.0) within two days while I also went to work for 8 hours both days.
I made the shirt by finding a green men's button-up at a thrift store. I took off the pocket and all of the buttons. I cut the collar to be rounded and then I braided a bunch of orange yarn to make the things that go across his chest (what are those things? lol) and added buttons on the ends. I sewed trim to the bottom and made epaulets out of cardboard. I bought fabric that perfectly matched the shirt and sewed around the epaulets and added trim. Then I found a pair of my dad's pants and made a quick pattern from them. I added some elastic in the back (My boyfriend's skinnier than my dad + I wasn't going to make a fly) and there we have the full effect.
Here's me in it just for fun (wearing the backup glasses) as soon as I finished it:
Everyone said I looked like Elton John not John Lennon. It was too big for my obviously. Good thing it was for my Bo and not me.
Thanks for looking!