Bruno Mars earned one of music's most coveted co-writing slots when he teamed up with Adele to write what ultimately became the 25 track "All I Ask." But Mars says he wasn't sure what to expect from the "Hello" singer, and he recently opened up about what the process was like.

"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 said during a radio interview with 103.5 KTU's Cubby & Carolina 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."

Mars continued, saying Adele's powerhouse vocals are just as gut wrenching and impressive live as they are on record -- a truth that can be easily corroborated by anyone who's ever seen the "Million Years Ago" singer live.

"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.

And for those of you eager to hear the two someday duet on the track together, Mars says he's just waiting for Adele to ask: "I don't know what she's waiting on, man. I'm like, 'Come on, Adele!' Like, send an email. Let me know!"

Check out Bruno Mars' full interview -- including advice he'd give Lady Gaga on her forthcoming Super Bowl performance -- with Cubby & Carolina in the Morning in the video above.

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