Christie Brinkley is showing support for her ex-husband Billy Joel following news of his recent brain diagnosis. The supermodel, who shares daughter Alexa Ray with the legendary singer, posted a video on Instagram Saturday -- just one day after Joel revealed he had been diagnosed with normal pressure hydrocephalus.

Brinkley said the clip, which began with Sailor singing to her mom’s ex backstage and went on to capture Joel performing some of his most beloved hits, made her laugh but “also reminded me of all the joy you create, and all the sensational sing a longs you’ve lead.”