Singer Taylor Swift's former flame Matt Healy has written a song about her.

Fans of indie rock band 1975 are buzzing about song "A change of heart", which was reportedly written by Healy for Swift, reports aceshowbiz.com.

The lyrics of "A change of heart" describe a cruel and shallow woman.

A source close to the 1975 lead singer told a publication named Page Six: "She may have inspired some of it, (but the song) is about more than one girl."

The two were linked in 2014 after he expressed his interest in her during a radio interview.

"I met Taylor Swift, that was really nice. We exchanged numbers. Let's see what happens," he told Shazam Top 20.

"You're calling that, are you? Let's just see what happens. I mean bloody hell, what am I going to do? Go out with Taylor Swift? She's a sensation, I wouldn't say no," he added.

Healy, however, denied any dating rumours with the "Shake it off" crooner in January 2015.