Canadian pop star Justin Bieber has teamed with country sensation Taylor Swift on a new song for his upcoming third album, though details were scant as the Boyfriend singer keeps fans guessing.
Bieber told British radio station Capital FM in a recent interview that Swift was one of several people he had worked with on Believe.
"I even wrote a song with Taylor Swift, so the whole album ranges differently," Bieber said. "With my music it doesn't only stay in a box. Everything is so different and that's why I'm so happy with this album."
Bieber (18) did not give the title of the song he wrote with Swift (22), nor did he say if the pair would sing it together.
The pop singer also has said he worked with R&B star Usher, rappers Kanye West and Drake and producer Timbaland on the new album which is expected to be released later this summer.
Bieber's first full-length studio album, My World 2.0, was released in March 2010. It debuted within the top 10 in several countries and was certified platinum in the US.
It was preceded by the worldwide top 10 single Baby. The music video of Baby is currently ranked as the most viewed and most discussed YouTube video. Bieber followed-up the release of his debut album with his first headlining tour, the My World Tour, the remix albums My Worlds Acoustic and Never Say Never -- The Remixes and the 3D biopic-concert film Justin Bieber: Never Say Never -- which had an opening weekend gross that nearly matched the record for the biggest opening weekend for a concert-film.