Christie Brinkley talks staying sexy at 61

At 61, Christie Brinkley's beauty is timeless, and now she's sharing her beauty secrets.

"When you turn 60, the key is to not stop moving," Brinkley told ET's Nancy O'Dell. "Once you start to stop moving, you rust. You got to just keep going."

And keeping mobile is an easy task for a mother of three who's always on the go.

"My daughter Alexa is going to be returning to the Cafe Carlyle in New York City for another torch-singing cabaret act that she does," Brinkley said. "My son [Jack] just graduated from 18 months of Actors Studio. He interviewed with four of the top agents. They all wanted him."

Brinkley says her daughter Sailor is following in her footsteps as a model, "but her No. 1 primary thing is to plan for the college she wants to get into."

Brinkley's No. 1 beauty tip is her own Christie Brinkley Authentic Skincare line, available at Kohl's, which, according to Brinkley, contains anti-aging products that the model and actress has worked on personally.

"This is the best cream I have ever put on my face," she said, referring to the Recapture Day + IR Defense Anti-Aging Day Cream. "I'm loving the results. Everybody who's used this tells me just the greatest things about the cream and what it's doing for them."

Brinkley is not only conscious of what she's making but also where she's making it available for consumers.

"We have them available at Kohl's, because that's where women shop and women can find them right there," Brinkley said. "And they have beauty advisors that explain all the science behind it."