Gayle King is single and ready to mingle. Promoting the ABC show "Oprah's Big Give" on Letterman, King laughed off reports she and best friend Oprah Winfrey were more than friends. After joking about how she got all dolled up to be on the show ("are you looking at my breasts?"), King, divorced with kids, told Dave she has a hard enough time getting a date on a Saturday night without men thinking she's already spoken for. "Now I have to explain: Look, I'm available!"