Christie Brinkley is one proud mom as daughter Alexa marks incredible achievement
Christie Brinkley is a doting mom to three adult children, and she was particularly proud of daughter Alexa Ray on Tuesday.MORE: Christie Brinkley displays all-natural beach look for important reasonAlexa Ray, who is the daughter of Christie and singer Billy Joel, is an accomplished singer and recently released some new music.And taking to her Instagram, Christie helped her daughter promote it, by sharing two clips.WATCH: Christie Brinkley and her children dance together on ThanksgivingThe first clip saw the mother and daughter sitting together in a boat, and the second clip featured her daughter beautifully playing Seven Years on a piano.The doting mom was full of pride in her caption, as she wrote: "Two Music Videos with my talented