Demi Moore, other celebs Tweet reactions to Amy Winehouse's death

Slideshow posted in Entertainment News | Saturday, July 23, 2011

12 of 34: "Dear God have mercy!!! I am SICK about this right now! #DearAmy," Rihanna wrote on Twitter, referring to British singer Amy Winehouse, who was found dead in her London home on Saturday, July 23. (Pictured: Rihanna performs on the 'Today' show on May 27, 2011.) (NBC / Peter Kramer)