09/10/2011 at 01:10 PM EDT
Did Amy Winehouse
die from trying to save her life?
Her father Mitch Winehouse says the troubled singer may have suffered an overdose from a powerful anti-anxiety drug and suffered a seizure during detox.
"Everything Amy did, she did to excess," Winehouse said at a taping of Anderson Cooper's show Anderson
, which debuts Monday. "She drank to excess and did detox to excess."
The final cause of death will be determined after an official inquest.
Mitch Winehouse said previously that no illegal drugs
were found in his daughter's system after she died
at age 27 in July.