A couple of weeks ago we bought Mere some Dora underwear and set out the little potty in the bathroom. She'd go, get candy, and then she pee her pants a few times.
Today she has gone multiple times, got multiple pieces of candy, and has not had one accident! In fact, I put her in a diaper after her bath because we'll be going out later and I didn't want to have her in underpants when we leave the house. She took off her diaper and then peed on the potty!
I'm not convinced that she is "potty trained" but I am convinced that for her, candy is a motivating factor!