Mick Fleetwood and Peter Frampton also appear on the star-studded cover
The comment appears in a letter that is being sold in a Beatles memorabilia auction this month
It features on her forthcoming 49th solo studio album 'Rockstar'
"I’d fucking pay to be in it"
“I enjoyed my time with Carl very much and send my love and sympathies”
It will be his first tour Down Under in six years
The possible tour dates would mark Macca's first shows since his headlining slot at Glastonbury 2022
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The pair have known each other since 1986
The Beatles icon's name appeared on sheet music