Alexa Ray Joel

Singer/songwriter Alexa Ray Joel backstage at Cafe Carlyle on April 4, 2014, in New York City.

Alexa Ray Joel on the red carpet at US Weekly's Most Stylish New Yorkers event at Harlow in Manhattan. (Sept. 10, 2013)

Christie Brinkley with her children (L to R) Sailor Cook, Alexa Ray Joel, and Jack Cook attend the South Fork Natural History Museum's SOFO Meets SOHO Benefit in Bridgehampton. (June 16,2012) Photo by Rob Rich

Singer Alexa Ray Joel performs at the Allegria Hotel in Long Beach, Saturday night. (June 12, 2010)

Alexa Ray Joel attends the Virgin Records & Boost Mobile VMA Post Party at Marquee August 31, 2006 in New York City.

Alexa Ray Joel and her mother Christie Brinkley attend the Wayuu Taya Foundation gala on June 17, 2009 in NYC.

Alexa Ray Joel appears at The Stephen Talkhouse in Amagansett on June 21.

Billy Joel is flanked by his daughter, Alexa Ray Joel, left, and his girlfriend Kate Lee during the arrivals of the 58th Annual Tony Awards at Radio City Music Hall. (June 6, 2004)

Alexa Ray Joel performs at the Ross School's sixth annual Club Starlight Benefit in East Hampton. (June 21, 2009)

Alexa Ray Joel, Billy Joel's daughter.

Bridgehampton, New York, June 21, 2008 - The 12th Annual Heart of The Hamptons Gala, Honoring Christie Brinkley. Alexa Joel and mother Christie Brinkley stand with each other at The 12th Annual Heart of The Hamptons Gala. Photo by Gina Tomitz

WEDNESDAY, CENTRAL ISLIP. Alexa Joel, left, arrives with an unidentified woman at Supreme Court in Central Islip for the first day of the divorce trial between her mother Christie Brinkley and Brinkley's fourth husband Peter Cook. (Newsday/Julia Gaines)

Alexa Ray Joel attends the Wayuu Taya Foundation gala on June 17, 2009, in Manhattan.

Alexa Ray Joel at Ross Schools 6TH annual Club Starlight Benefit in East Hampton. (June 21, 2009)

Billy Joel arrives with his daughter, Alexa Ray Joel, at the opening of 'Movin' Out' at the Richard Rodgers Theater. (October 24, 2002)

Billy Joel flanked by new flame Trish Bergen and daughter Alexa Ray. (April 17, 2000)

Alexa Ray Joel, daughter of singer Billy Joel and model Christie Brinkley, arrives for the premiere of "The Hamptons." (June 1, 2002)