Singer-songwriter Cody Simpson has revealed that the songs he wrote with Canadian sensation Justin Bieber might not surface for a while because his own material is what's important now.

During a new interview with Billboard for the Pop Shop Broadcast, the Aussie heartthrob explained that their collaborative project is now on the backburner as they've mutually agreed to focus on their own careers for the time being:

"Last year, we actually did an entire acoustic album, of which I don't totally know what's going to happen, because we both made a mutual decision to get our own projects out before that."

"Possibly. I don't want to make any promises, but you'll definitely hear something more in the future, whether it's on my album or. once I establish my own music for what it is, I can go outside the box a little bit."

Back in the autumn, Simpson revealed that he and Bieber had written 12 songs in just one week: "We went in and ended up being in the studio till six in the morning, came out with a song, went in the next night and then ended up writing, like, 12 songs in seven days, working all night.

"We're both very different people and we're both inspired in very different ways but I was able to come in and play some guitars and we were able to write some beautiful songs together, pretty acoustic-sounding, so you'll hear some music this year."

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Watch his performance of new song 'Flower' below: