Madonna has been more relevant than her and Cher can't stand that.
She had one hit in the past 30 years, Believe, and now she can stay in the front line only with doing ABBA karaoke, when Madonna still delivers amazing songs and tours, and has az incomperable hit catalogue for the past 35 years.

Sit down Cher, and go back to the gay clubs and do ABBA karaoke.