Best at home spray on tanner?

I am getting my pictures taken on march 3, and i am VERY white. so i need a spray on tanner that will make me have a nice medium tan. i also need it to make me have a rather dark (not too dark) tan buy march 21 because i am in a wedding. i have very fair skin and don't get very much sun. i also need it to be able to be used on my face. and please no expensive ones that i have to go to a tanning place to get! ONLY at home spray or lotion tanners. any help would be much appreciated! :-) 10 points for best answer! thanks in advance!