Hit single "Flying Without Wings" was re-recorded as a duet with South Korean singer BoA and Mexican singer Cristian Castro, and each respective duet was included on the Asian and Spanish editions of the album respectively.

In October 2008, IFPI announced that the album was certified 2× Platinum, exceeding two million sales in Europe.

In 2008, the album was re-issued in New Zealand, titled "Unbreakable: The Greatest Hits - 2008 NZ Tour Edition".

1 on the albums chart there, and achieved 2× Platinum status, with more than 30,000 copies sold.

[33] Bonus features include an interactive documentary, hidden outtakes, studio sessions, and US versions of music videos for "Swear It Again" and "World Of Our Own".