Could you lay out 2 choices of clothes and let her choose which set she wears? She might be a bit more forthcoming in putting them on if she thinks she was involved in choosing the outfit.
A sticker chart, one sticker for everytime she co operates in getting dressed. 10 stickers = a treat or something along those lines.
Shes obviously got into a game of doing this and just needs the cycle broken. Use the power of silence rather than arguing with her. Give her 2 choices and make her choose one and stick with it. ie: you can either put on your clothes yourself like a big girl, or mummy will put them on for you. Which will you choose? Don't show her you are getting angry, bite your lip even if you are fuming inside. Ask her why she doesn't want to get dressed, is there a reason?
Don't know if any of this is any good, but thought I'd throw a few suggestions your way.