Legendary crooner Frank Sinatra allegedly ordered a hit on controversial radio DJ Howard Stern.

But underworld thugs may have murdered the wrong person by mistake, according to an astonishing new book.

Ol' Blue Eyes - who had well-known links to the Mafia - was reportedly furious because shock jock Stern lashed his children in an on-air rant in the early 1990s.

Author Ian Halperin revealed: “He criticised Frank Jr. and Nancy, and Frank lost his cool.

“Everybody who ever knew Frank knew he was a nice guy, but you didn't want to piss him off. He had a big temper.

“And Frank allegedly put a hit on Stern. I have extreme corroboration on this.”

(Image: Getty)

Author Halperin - who is currently finishing the tell-all book on Stern - is convinced an unnamed victim may have been accidentally whacked by Mafia assassins after being mistaken for Stern.

Read more:Rare Sinatra photos show singer made for the movies

He said: “A guy very similar to Howard's profile - same height, same look - was killed in that era."

There is no suggestion Frank Jr. or Nancy were ever aware of this or involved.

The outrageous claim was lashed by Frank Sinatra’s estate.

A spokesperson said: “This is absolutely and completely ludicrous, and it’s someone using Frank Sinatra’s name to get their 15 minutes of fame.”

(Image: Getty)

It’s not the first time Sinatra has been accused of using his alleged Mafia ties.

In ‘Woody’, a recent book about Woody Allen , author David Evanier claimed he asked the Mafia to kill the movie director in retaliation for allegedly sexually abusing Dylan Farrow, Allen's adopted daughter with Sinatra's ex-wife, Mia Farrow.

Allen always denied the claims, which have never been proven.