Los Angeles: An alleged new Justin Bieber's song has surfaced online.

Justin Bieber
Justin Bieber. Pic/Santa Banta 

Titled 'Perfect Together', the slow-tempo R&B/pop tune hitting the web over the weekend is only two minutes long and sounds unfinished.

The leak features Bieber singing about how he and his girlfriend, whom lots of fans assume is Selena Gomez are perfect for each other although their relationship could sometimes feel wrong.

"I'm not perfect sometimes/ No you're not perfect sometimes/ But even when it's wrong it feels right/ 'cause we're perfect together," the song reads.

There's still no word if "Perfect Together" is an old demo or a new song planned for the Canadian heartthrob's new album, which he's been working on in the past few months.

No official release date for the project has been set yet. Meanwhile, Bieber has been enjoying the success of "Where Are U Now", his collaboration with Jack U aka Diplo and Skrillex off the EDM duo's album.

The song has peaked at number eight on Billboard Hot 100.