Carly Rae Jepsen and Justin Bieber team up on the duet 'Beautiful' on Jepsen's latest album, 'Kiss,' which hits stores tomorrow (Sept. 18.) What does 'Beautiful' sound like? Jepsen herself describes the tune as, "charming, friendly and hopefully feel-good."

Jepsen tells MTV Europe, "It's kind of like a friendship ballad, it's kind of charming and it's sweet and a little bit of a different flavor to what I have on my album too... I think it's like a feel-good song for sure."

'Beautiful' has a light, acoustic style reminiscent of Colbie Caillat, with lyrics that sound like they're directed to a sweetie rather than just a friend. Jepsen sings, "The more that I look around, the more I realize you’re all I’m looking for," while Bieber croons, "Nothing in the world compares to the feelings that we share."

Jepsen added that the duet was an unplanned accident after she flew to L.A. to meet Bieber for the first time. "He was just a regular guy, so nice, so talented but at the same time really humble about it and played me some songs from his record 'Believe.' One of the tunes was the song 'Beautiful' and he'd written it with a good friend and producer that we both know, named Tony Gad."

She added, "I remember just thinking 'Wow, this is such a different flavor than I'd ever think of doing. It's really cool,' and he asked me if I'd like to sing on it. Of course, I was very excited to do that, and we did it that night. I was going to go to bed but they were like, 'Why don't you just jump into the studio tonight and finish the song right now?' So, 15 minutes later I was in the vocal booth."

The 26-year-old Canadian thanked Bieber for being in her corner. "Since I was seven years old, this is all I've been wanting to do, and having him kind of be my supporter and really my introduction to everything; it's the greatest gift. I'm forever thankful to him for that."

Watch the Carly Rae Jepsen 'Call Me Maybe' Video