Cher

 Cher was one of the outstanding artists long before The Copy of Pop came out. In the late 80s the time has came for Cher to be her inspiration. This when these Madona's photos were taken and she performed Cher's song 'I got you babe'.
Cher knows that Moldonna is untalented:
"... She's unbelievably creative cause she's not unbelievably talented. She's not beautiful, but she's kind of, she's rude... So this man asked me how I feel about her. She's creative but she's rude and then I used another word and they bleeped me." 
but she definitely doesn't know that Runaway lover ripps off her Runaway.