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When Bruno Mars first met Adele, she wasn't what he thought she'd be.

Along with Philip Lawrence and Christopher Brody Brown, the Grammy winners co-wrote the song "All I Ask" for Adele's album, 25. "She walks into the studio and she's got all this attitude. She's a diva. She's like, 'I don't want to do this. I don't like that,'" Mars, 31, recalled Tuesday in an interview with KTU 103.5's Cubby & Carolina Bermudez in the Morning. "Then, as soon as we hit a couple chords that she liked, we started rolling—and that's where we got that song from."

Bruno Mars, 24K Magic

Atlantic Records

Adele knocked it out of the park, and it didn't take long to erase the first impression she'd made on Mars. "She's incredible. There was a moment when she was singing in the booth—I'm not exaggerating at all—and the water was vibrating. Like, you know, that scene in Jurassic Park? She's got some pipes on her, and she's just a superstar," he said. Mars admitted he would jump at the chance to perform "All I Ask" with the 28-year-old songbird—but it's up to her. "I don't know what she's waiting on, man. I'm like, 'Come on, Adele!' Like, send an email. Let me know!"

Adele, 25

Instagram

Mars previously told Vogue that "All I Ask" was inspired by the power ballads of "divas from the '90s, where the artist is really showing off their vocal range." At the time, he said, everyone "crowded around the piano until we found something that sparked." It took just one day to record Adele's vocals, "and maybe one more day to make sure we weren't tripping out and we actually had a song. It makes me very jealous because it doesn't happen like that all the time!"

Adele also told i-D in 2015 she'd a good time working with Mars and his production team. "We [were] gonna make something cool, but then we were just having too much fun. I've never sung so hard in [my] whole life," she said. "Can you imagine the fun me and Bruno had making that?"

Meanwhile, Britney Spears recently revealed she'd love to work with Mars. "Really? Right on, Britney. Come on, Britney! Come on down to the studio. Let's get it," the "24K Magic" singer said on Tuesday's show. "Britney's an icon. I'd love to get in the studio with Britney one day."

But who does Mars want to work with? "I haven't done a song with Beyoncé," he said, adding that he'd also like to work with Rihanna—or, really, anyone who asks. "It's a job fair," he joked.