After Billy Joel’s diagnosis with a brain disorder that will keep him offstage while he undergoes treatment, there’s been an outpouring of support from fans and loved ones including his ex-wife Christie Brinkley and their daughter Alexa Ray Joel. Brinkley wrote that the whole family is sending lots of love, adding “please take good care of yourself, you’re our piano man.” NBC’s Liz Kreutz reports for TODAY. » Subscribe to TODAY: youtube.com/@TODAY About: TODAY brings you the latest headlines and expert tips on money, health and parenting. We wake up every morning to give you and your family all you need to start your day. If it matters to you, it matters to us. We are in the people business. Subscribe to our channel for exclusive TODAY archival footage & our original web series. Connect with TODAY Online! Visit TODAY's Website: today.com Find TODAY on Facebook: facebook.com/today Follow TODAY on Twitter: twitter.com/TODAYshow Follow TODAY...