Missed this one. Singbox, the singing app for iOS based on Pet Shop Boys songs, was updated on 28 June.
The 2.3.1 update includes the following updates:
- New lyrics game
- New song: Domino Dancing
- New song: Opportunities
- New song: Heart
- New song: Left to my own Devices
- New song: Suburbia
- New song: New York City Boy
- Game Centre Integration
- Pop Filter
There are nine songs in all, and each cost 69p. You can read more HERE on the iTunes page.