Amy Winehouse said she was "so happy and proud" of her Grammys victory on Sunday night, but it seems not every is sharing in her joy. Singer Natalie Cole, daughter of late music legend Nat King Cole, has criticised the singer's triumph at the ceremony, saying she did not deserve to win any awards. The Unforgettable singer, who has admitted to using drugs in the past, claims Winehouse is being rewarded for her "bad behaviour". She told a US magazine: "I don't think she should have won. I think it sends a bad message to our young people who are trying to get into this business - the ones who are trying to do it right and are really trying to keep themselves together." Winehouse, 24, took home five Grammys on Sunday, including record of the year, song of the year and best new artist. She also rocked the crowd at the Staples Center in Los Angeles, California, with performances of You Know I'm No Good and Rehab via satellite. But Cole, who scooped her first Grammy Award in 1975, told People magazine the troubled Brit was not a worthy winner. Controversial win: Natalie Cole (right) says Amy Winehouse's Grammys victory sends a 'bad message'