We all know and love Stockard Channing, 73, for playing Rizzo in the 1978 classic Grease. In an appearance on the UK talk show Lorraine on Oct. 17, she looked… different. Now, it has been almost 40 years since the famous flick, but fans went wild with speculation over her changed appearance. One British watcher exclaimed: "Good grief, Stockard Channing looks unrecognizable on #Lorraine. Such a shame that people feel they can't simply age gracefully." We called up a doctor to offer his expert opinion.