How to deal with a copy cat? it does my head in?

right i have two friends who do everything that i do and soon im going to scream! its not a normal advance of copying, they've taken to the extreme.its really starting to bug me.well it all started just before Christmas when i came in with all my pretty things, and i adore this shop right and now they love it two coincidence right? well i thought nothing if it until i taken the biggest mistake of my life by telling them the shoes i really wanted they are so cute:) i came in to school the next day and then she says to me "im thinking of getting those shoes" i laughed into myself and said cool, the next day she comes in with them so now i cant get them cause it will look like im copying her! well last year i worn lip gloss she does then this year i wear light pink lip stick and now she wants to buy one LOL *copycat* *cough* then i got highlights in my hair tho in the underneath of it and now she wants some tho not on the top of her hair the underneath! and the way i wear my hair she copy's, and i have long nails right and i bring a nail file to school she doesn't have any white on her nails she seen me filing mine the next day she comes in with one in her pocket. ino these are all small things though they all add up and are getting very annoying if you can help then please do thank you. :)