This song is autobiographical. Many successful musicians are haunted by their own personal demons of drink and drugs, and Winehouse is no exception. In February 2007 her father gave a candid interview to the Sun
newspaper in which he denied that his daughter was an alcoholic, although he admitted that like many single women of her age she sometimes overdid the drink. On one occasion, after splitting up with her boyfriend, she fell over and hit her head.
Her previous management company wanted her to go into rehab but she said she didn't need to. Her father agreed, adding that she wasn't an alcoholic but had been drinking too much because she was lovesick, and "You can't go into rehab for that." Alcoholics drink everyday, he said, and his daughter didn't. Hence the line: "They tried to make me go to rehab, I said no, no, no."