A trial heard how Lorraine Foy's teenage daughters saw their 36-year-old mother stabbed to death in a frenzied attack in Glasgow street on June 22 last year.
There had been a "shouting match" as Tracy Meikle, 33, stood at her first floor window in Cranhill, and Ms Foy stood in the street, accusing Meikle of head-butting a 14-year-old girl.
Meikle had been taking Valium washed down with Buckfast and cider, judge Lord Jones was told.
Ordering Meikle to serve at least 15 years before she can apply for release on licence, the judge told her he had read accounts from Ms Foy's daughters and other relatives on the impact of her death.
"The whole family has been devastated by the pointless murder," he said.
Lord Jones noted that background reports also said Meikle very much regretted what she had done.
Defence QC Gordon Jackson, pleading for leniency, said the murder "arose out of nothing".
Meikle could remember little of what happened, said the lawyer.
Mr Jackson added that Meikle had a history of being abused, broken relationships and drink and drugs.
But since she had sobered up in Cornton Vale she had become a pleasant and sensible young woman, which made the tragedy all the greater.
At her trial, Meikle claimed she had been acting in self defence. But a jury rejected her claim and found her guilty of murder.