How to make alvin and the chipmunk costumes?

how can me and my friends make alvin and the chipmunk costumes?How to make alvin and the chipmunk costumes?
It depends on how complex you wanyt them. If you just wanna be recognized as the chipmunks, theres more than one thing you could do clothing wise. if you want to be the chipmunks from '07 - '09 then you just need blank red, green, and blue hoodies and black circular crameglasse. The glkasses you could wind as an accessory to a Harry potter costume. Or if you want the be the chipmunks from any time earlier (90's 80's 60's) then instead of 3 hoodies, use 3 turtlenecks. Oh, and on the red one of which ever you choose put a big yellow A on it. You could sew it on, or you could paint it on, or whatever. if you wanna be more complex, you could make paper mache chipmunk heads. =)