Despite a joint age of 150 years, a century in the music business between them and health concerns, American country giants Kenny Rogers and Glen Campbell are playing two concerts together in New Zealand in August.
For Campbell, 76, the dates come after last year's announcement that he was suffering from Alzheimer's disease and the release of his acclaimed farewell album Ghost on the Canvas.
Promoters of his New Zealand show said his condition "has not affected his performances although this tour Down Under may be his last".
Campbell was last in New Zealand in 2009, when some attending a Rotorua concert were offered refunds after the star's voice gave out early in his set.
Rogers, 74, was here early last year to play a show at Vector Arena with the APO which was given a thumbs up by NZ Herald reviewer William Dart, who described it "as a testament to the special relationship between a veteran singer and his thousands of loyal fans".
Earlier, the gravel-voiced Rogers told TimeOut: "I've got a bad knee and a bad back and shoulders. Other than that, I am doing great ... My voice seems to be doing really well.
"I'm really lucky. I have made a lot of money with a bad throat."
The two men bring their vast number of hits to CBS Arena in Christchurch on August 10, and Auckland's Vector Arena on August 12.
Tickets for each show go on sale on Monday.
Kenny Rogers & Glen Campbell
August 10: CBS Arena, Christchurch
August 12: Vector Arena, Auckland