Olivia Newton-John's Daughter Chloe Praises Mom's Judging on 'DWTS'

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Olivia Newton-John was a guest judge on Monday night's Dancing With the Stars, as contestants recreated moves from movies, but the actress' best moment came after the show.

The Grease star's 29-year-old daughter, Chloe Lattanzi, accompanied her on the red carpet and complimented her mom's judging skills.

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"You were, like, professional," Chloe gushed.

Internet personality Hayes Grier, 15, performed to "You're the One That I Want" from Newton-John's classic flick, Grease, despite having never seen the 1978 musical. Still, the young star earned high praise from Newton-John, who compared him to her co-star, John Travolta, calling him "baby John."

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Lattanzi told ET she first saw the movie when she was six and used it as a comfort blanket before bed.

"When she would go away, I would put the tape on replay at night when I would go to sleep," Lattanzi shared.

"Isn't that sweet?" Newton-John said. "I feel so bad."