Amy Winehouse RIP

After Amy Winehouse passed away Saturday, some stars took to posting tributes on Twitter:

--Rihanna: "Dear God have mercy!!! I am SICK about this right now! . . . I am genuinely heartbroken by this . . . ICONSneverDIE"

--Katy Perry: "RIP Amy Winehouse. May she finally find peace."

--Ricky Martin: "I just found out. I feel pain. I feel anger. Rest beautiful girl rest. You are free!"

--Kim Kardashian: "I just heard the news that Amy Winehouse passed away. What a true talent. I pray she's in a better place & at peace."

--Demi Lovato: "Amy Winehouse. So sad. Unfortunately the world lost an incredibly talented woman to such a powerful disease... addiction. #RIP"

--Carson Daly: "RIP Amy Winehouse. How tragic."

--Lance Bass: "Another talent dies at 27- RIP - Amy Winehouse."