Her management wanted her to go to "Rehab", so she fired them & sang about it on "Back to  Black"
In the song that made her famous, Rehab, Winehouse sings about how her 
father told her she didn't need go into rehab (I ain't ... She'd have a chance to be 
dealt with by professionals before the world wanted a piece of her.. [DOC] [TLE] Amy Winehouse's manager Nick Shymansky: 'She'd be so sweet ... [PAR] Jun 14, 2015 ...