Christie Brinkley and Billy Joel's daughter, Alexa Ray, goes topless in sultry beach photo

Alexa Ray Joel may have her dad's big eyes, but the rest definitely comes from her mama!

The 31-year-old daughter of Billy Joel and Christie Brinkley, who posed alongside her mom and sister for Sports Illustrated's Swimsuit Issue earlier this year, shared a fully topless photo this week. The brunette beauty is seen by the ocean, lightly cupping her hands over her breasts.

"Cultivate and celebrate the skin you're in; don't compete, don't compare," she wrote. "You're precious and sacred, whether covered or bare."

The photo appears to be a still from Alexa Ray's Sports Illustrated shoot. She previously shared a number of other snaps from the shoot, but always clad in a black bikini. In February, her younger sister, Sailor, shared set photo of both women sans bikini tops.

Sailor is currently traveling with Christie as a volunteer medic in Haiti. Christie is an ambssador for Smile Train, a philanthropic organization that sends doctors to operate on people with cleft palates in impoverished countries.

"We are honored to be amongst such heroes," Christie, clad in scrubs, captioned a photo of herself, Sailor and a Smile Train surgeon named Dr. Damas. When they're not assisting during surgeries, the mom and daughter have been exploring Haiti, which is "well over 100 degrees!" Christie wrote.