She co-wrote some songs which have become jazz standards , like `` God Bless the Child '' , `` Do n't Explain '' , and `` Lady Sings the Blues '' . She co-wrote only a few songs , but several of them have become jazz standards , notably `` God Bless the Child , '' `` Do n't Explain , '' `` Fine and Mellow , '' and `` Lady Sings the Blues . ''