Rein Me In, which features on Fender’s album People Watching, beat the likes of Raye, Lola Young and Calvin Harris.
Fender and Dean made UK chart history last month after their slow-burning collaboration finally made it to number one after 35 weeks to become Fender’s first ever chart-topping single.
The song, which was released in June, finally reached the summit, breaking the record for the most consecutive weeks in the top 40 before reaching number one.
Asked about why he thought it took so long to reach the top, Fender told BBC Radio 1: “I guess it’s the internet, it traveled online and people come to it later, which is wonderful really because it’s the music that’s doing the talking.”
The pair previously gave the melancholic ballad its live debut, performing it together during Fender’s gig at the London Stadium, home of Dean’s team West Ham United.
She also joined him onstage again a week later, to sing the same song at St James’ Park, home of Fender’s beloved Newcastle United, like the home and the away leg of the same musical tie.