Costner was caught admiring the "Believe" singer in total awe of her stardom. With his hands on his head and a smirking stare ...

And, if we want to get really specific, one of our favorite moments was Cher's iconic performance...and Kevin Costner's ...

The 78-year-old music icon, who arrived with her boyfriend Alexander Edwards on her arm, attended the celebration after her iconic performance over the weekend.