Collaborations like Elton John and George Michael's 'Don't Let the Sun Go Down on Me' (1991) and Eminem and Elton John's Grammy performance of 'Stan' (2001) demonstrated the power of unexpected pairings to create chart-topping hits or generate significant cultural buzz. Other notable duets include Lionel Richie and Diana Ross's 'Endless Love' and Kenny Rogers and Dolly Parton's 'Islands in the Stream'.