Technically, yes, she already had a copyright/trademark on it when it was said. That is why I mentioned she has hard proof that she is the originator of the phrase.
I use the "poor man's copyright/trademark" of mailing myself hard copies of stuff I create. I don't open it though. I put the name of the item inside as the name on the return address portion so I know what it is. If I ever need to make good on it in court, opening it in court becomes the new guarantee that I am protected as the mailing date from the United States Postal Service is entered in court at time of opening of the envelope.
Same thing for her saying this on television. The only thing that could be a problem for them is that Dr. Phil's show try to claim a portion of the proceeds from the catchphrase since it debuted on his show. I am not sure how those talk shows are setup so that may be a mute point but one worth investigating.