K.B.
1) Stop trying! It's a power struggle and until it's not she won't go. The only way for it not to be a power struggle and for her to do it on her own free will is to just stop talking about it. Leave her potty chair out or her potty seat in sight but leave it at that. Put her in diapers, change the diaper in silence, no extra attention at diaper time. Make it boring and let her come up with idea on her own to go potty.
2) Take her around kids that are potty trained. Kids her own age if possible, or someone older that she adores that is not living with her. Ask them to allow her to follow them into the bathroom and watch them. If she wants to be like her "friend" she will start to go too. Kids her own age that are potty trained will show her that she can do it.
My son said he was worried about getting less attention with not having the diaper change time. He also wanted to play and potty took too long. So I did the above and he started going within the week, more like 3 days. :)