Diapers

So Claire, who is almost three, was potty trained. Then, I don't know what happened but she completely regressed. Started leaking in her underwear and changing them every time she went. Now she is back in diapers. I tried asking her if she was a baby, and even singing a little song - Claire is a baby, baby, baby, but she just started singing and dancing along. So, I am back to two in diapers:(