Speaking to The Sun, the 33-year-old said: "My romance with her was eight months of madness.
I was crazy, she was crazy and that’s why we hit it off from the start."Goddamn, we were going out every night, we were going nuts.
Mr Best added that he was still friendly with Sarah after their split – but after these latest revelations, we doubt Sarah will be feeling too pally.
However, she now says her wild days are behind her, and is currently dating Mark Foster.
Pictured back in 2013, Sarah Harding sported a monochrome striped dress for the armed forces charity ‘Coming Home’ event in London.
Designed by German brand Marc Cain, Sarah's dress was a catwalk piece from the spring/ summer 2013 collection.
The British star's last relationship - which began in 2012 - ended in heartache when the DJ ended things with her over her commitments to gymnastics reality TV competition Tumble, which commenced in August 2014.
Speaking about finding love again late last year, Sarah told The Mirror: 'The break-up did shake me and of course I was upset.