Billy Joel advised his ex-wife Christie Brinkley to hire a vocal coach to protect her voice as she thrills audiences in the Broadway production of Chicago.
The former model is currently starring as Roxie Hart in the hit musical, and she reveals her former partner got in touch straight away when he found out about her new job.
Brinkley admits the legendary musician was full of helpful tips to get her through the gruelling stage role, telling Access Hollywood, "The second he heard that I was doing this he said, 'Make sure you get lessons to project your voice because you've really got to get it to the back of the room'. So, yeah, I've been taking singing lessons and dancing lessons."