R&B star Jordin Sparks has taken aim at her ex-boyfriend Jason Derulo in her new song How Bout Now (Remix).

The pop couple parted ways in September (14) after three years together and Derulo subsequently insisted the break-up was "not a bad situation", adding, "Everthing is cool".

Sparks has remained largely quiet about her side of the split, but now she appears to have vented her issues with the Talk Dirty hitmaker in the lyrics to her latest track, on which she references his 2012 broken neck injury.

On the song, she sings, "Feeling like I have to get all of this off my chest/I know you are sitting there thinking, 'What is she going to do next?'/Remember I deleted all my other guys' numbers out my phone for ya?/Remember when you broke your neck and I had to wash your back for ya?/You probably don't remember half of the s**t that I did for ya."

How Bout Now (Remix) is due to feature on Sparks' forthcoming mixtape collaboration with The L.A. Leakers.