That's according to Sheena Easton, who famously sang with Prince on U Got the Look, one of the songs from his classic 1987 album Sign o' the Times.
Some have questioned Styles's use of the title, especially since the album has just turned 30.
Yet Easton believes Prince, who died last year, would not have disapproved.
"I'm sure he doesn't mind," the Scottish-born singer told the BBC on Tuesday.
"Prince was such a giving, loving person, I'm sure he's up there saying 'go for it'."
As far as Easton is concerned, "nobody has a claim on a song title".
"So long as the song is different, that's the important thing," the Scottish-born singer continued.
The 57-year-old performer was speaking to the BBC after the press night of 42nd Street, in which she makes her West End acting debut.
42nd Street gets royal seal of approval
Sheena Easton to make West End debut
As well as the Duchess of Cambridge, the first night audience included Dame Esther Rantzen - to whom Sheena owes a special debt of gratitude.
It was partly thanks to the presenter's BBC TV programme The Big Time that Easton shot to success in the early 1980s.
She went on to sing the theme tune to 1981 Bond film For Your Eyes Only and win two Grammys.
"Esther's known me since I was younger than my daughter is now," Sheena marvelled on Tuesday.
"It was lovely to see her; she hasn't changed a bit. She looks the same - she never ages."
Harry will debut his first solo single on the Radio 1 breakfast show on Friday, after which he will give his first interview about the song and his new album.
The 23-year-old is pictured in Wednesday's edition of The Sun dangling from a helicopter while shooting the video for his highly anticipated new track.
42nd Street is currently running at the Theatre Royal Drury Lane in London.