The musician recently became a grandfather to Poppy Rebel

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Billy Idol is over the moon about his newest fan club member.

The British rocker, 65, best known for '80s hits such as "White Wedding" and "Mony Mony," recently became a grandfather to granddaughter Poppy Rebel, and says the 1-year-old is already dancing to his music.

"The other day she was bouncing up and down to 'Rebel Yell,' " he says of his Grammy-nominated song. "But of course, she also loves 'Baby Shark.' "

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Credit: Ramona Rosales

Idol, who will release the EP The Roadside on Sept. 17 and embark on a U.S. tour in the fall, says a year off and the extra time in L.A. with Poppy — whose mother is Bonnie Broad, 31, Idol's daughter with ex Linda Mathis — has been so much fun.

He's currently having a blast helping teach his first grandchild to walk and talk. 

"She can say 'dude,' 'duck' and 'fish,' " he says.

Idol adds that becoming a grandfather has changed him in ways he never expected.

"It opens you up emotionally," he says. "Everything is a new experience for her. In a way, I'm reliving those experiences myself."

For more on Billy Idol, pick up this week's issue of PEOPLE on newsstands Friday.