Benatar said she's a big fan of Sinatra-era tunes, as well, and had the pleasure of meeting the singer/actor at a club in the late 1970s.
Sinatra was leaving when he noticed Benatar standing with her manager, Ricky Newman, and asked about her.
"Newman says, 'Oh this is Pat Benatar. She's a new singer and she's really great. You're going to be hearing about her,'" she recalled.
She said that Sinatra pinched her cheek.
"'[He said], 'Who couldn't love this little doll face?'" she said, marveling on how surreal the experience was for her. "His eyes were exactly like they say -- they were so blue. And I was looking at him thinking, 'Oh my God, I'm looking at Frank Sinatra.'"
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Benatar admitted that show tunes are a guilty pleasure for her because they provide a reprieve from all of the pop music that permeates her life and career. She added that a longtime love for theater doesn't hurt either.
"That's why I love to play," she said. "The reason I still drag my butt out there for 10 to 12 weeks out of the year is because I absolutely love performance."
Benatar said that although she enjoys making records, she considers it self-indulgent. Where she really wants to be is onstage, performing for an audience.
"The whole point to me is this shared experience that happens between us," she said. "It's very seductive.
"It's the reason I started doing it," she said, "and it's the reason I continue to do it."