Attorney Jon Posner, 73, lost his month-long battle with cancer on Wednesday and he was laid to rest following a funeral service at the Ira Kaufman Chapel in Southfield, Michigan on Friday.
The ceremony included a touching tribute from the hitmaker, who honoured his dad with a cover of "Bright Eyes song First Day Of My Life", reported TMZ.
The singer previously referred to his dad's cancer diagnosis during a performance on US talk show Conan in May, when he changed the lyrics to his "I Took a Pill in Ibiza" track to reference the family issue.
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