Dolly Parton was forced to turn down a very exclusive invitation during a recent trip to London. The 77-year-old American treasure reveals in a new interview why she had to take a rain check on a tea date with Kate Middleton. «Lordy, I even got invited to have tea with Kate,» Parton told Sally 'Traffic' Boazman on BBC Radio2 over the weekend while discussing her latest visit to the U.K.Parton said that her schedule was so jam packed with album promotion for her upcoming release,, that she couldn't fit in a meeting with the 41-year-old Princess of Wales during the trip.