Article continues below advertisementKim Carnes is not holding back her thoughts on JoJo Siwa's rendition of "Bette Davis Eyes." The iconic singer, who made the song a hit in the '80s, seems to have expressed her opinion in a now-deleted Instagram post that circulated on Reddit."There's a difference between singing a song ... and embodying it," Carnes, 80, allegedly wrote. "I've always believed authenticity is what makes music timeless ... I'm forever grateful to be the voice behind this one ... 'Bette Davis Eyes.