Touring to promote her latest album, Wallflower, Canadian jazz icon Diana Krall spoke to RN Afternoons about learning to hand over a level of control, and being set up with her husband Elvis Costello by one of the biggest names in music.

Elton John is your wingman.

He's trying to set you up with Elvis Costello, but as you stare across your piano to him during a duet, Costello literally falls off stage in front of you and out of sight.

He leaned back to sing the high note and all of a sudden I couldn't see him anymore! Diana Krall on the courting process with now-husband Elvis Costello

Enter the bizarre, celebrity-studded world of Diana Krall.

'We were just courting and had just met each other, and Elton was encouraging us,' says Krall.

'We were performing together on an old stage and Elvis had on very new, very modern and pointy shoes.

'He leaned back to sing the high note and all of a sudden I couldn't see him anymore!'

The absurdity of it is not lost on her.

'He literally fell for me,' she laughs.

'We've been together ever since.'

The Canadian pianist and singer has sold more records than any other female jazz musician in the past 30 years, picking up nine gold, three platinum and seven multi-platinum albums in the process.

Her latest album Wallflower sees Krall return to the top 40 hits of her youth in the 1960s and 1970s.

It also saw her give up a level of creative control to 16-time Grammy winning pop producer David Foster.

It is a collaboration she is immensely pleased with, but one that had some tense moments.

'There was a few door slams, and I wasn't the only one slamming the door,' says Krall.

'It certainly wasn't over the lunch menu; I think it was over how many jazz chords should be in a song.'

There is little sign of a faded, jaded or controlling celebrity in Krall's voice, though.

Instead, what radiates is a genuine sense of wonder that this, of all professions, is what she does for a living.

'I still feel like I'm a 16-year-old kid saying "I get to do this!"'

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