To be honest, some songs could be played on the keyboards, instead of backing track. Ex: Viva la Vida
- in Viva la Vida Tour: Chris play keys after Jonny start playing guitar.
[ame=http://www.youtube.com/watch?v=AkdrsK6r0bU]Coldplay - Viva La Vida Live Tokyo 2009 Legendado (Inglês) HD - YouTube[/ame]
- in Mylo Xylotour Chris plays a bit of keys, then back singing, using back track.
[ame=http://www.youtube.com/watch?v=GuR_yinmktQ]Coldplay - Viva La Vida (Live on Letterman) - YouTube[/ame]