help pleaseee.

okay, well, i took this picture on my sidekick,
and now when i have it on the computer its like ... weirdd.
my hair looks green and my skin looks freakishly white
[when in fact i am tan ...]
so, is there any way to fix this at ALL ?
and is there anything i can do to make the picture look smoother,
because i would like to have it as large as possible.
someone, please help me !!
i know yall are amazin on photoshop & stuff here, haha. [:
i'd really appreciate ANY help.
full size.
[sorry for largeness].