Justin Bieber and BTS are reportedly preparing to enter the studio together.The pop superstars are said to be working on a track to feature on a deluxe expanded edition of Bieber’s recent album ‘Justice’.A source told The New York Post‘s Page Six: “They are taking their time on it and going to make sure it is released right.”They said the song “could be part of a deluxe release of ‘Justice’ to keep the album on the charts.”A deluxe edition of ‘Justice’ would be the second such release.