The mother-of-three, 57, has revealed the Uptown Girl hitmaker told her how to make the best of her singing voice.
“He helped with my projection,” she said.
Brinkley — who has appeared on more than 500 magazine covers — also revealed that dancing in the show had “definitely” improved her figure.
Brinkley was criticized for her dancing in the 1983 video for Joel’s hit Uptown Girl – but insists she has improved since.
Christie recently insisted she is in no rush to find the man of her dreams.
“Most of the time, I’ve got my kids with me, so I’m not as prone to meeting people,” she said.
“And then, you never really know if someone is talking to you because you’re a celebrity. It’s not my number one priority.
“I always knew I wanted to be a mother … it takes a lot of work.
“My work makes me a better mom. It gives me a little door to step out of my parenting and bring the excitement from that day back home.”
See a nice shot: