The extended deal with Buble includes songs co-written by Chang for his albums Michael Buble, It's Time and Call Me Irresponsible, while also taking in future works.

The new agreement also includes his fourth and most recent album Crazy Love, which topped the OCC UK and Billboard 200 US albums charts last year and was 2009's third biggest-selling album in the UK with 1.2m sales, according to the OCC. The album includes the UK Top 10 hit Haven't Met You ...