Mutya Keisha Siobhan flawlessly perform acoustic version of 'Flatline'...

On top of releasing their single 'Flatline' on iTunes, Mutya Keisha Siobhan debut this acoustic version of the song over the weekend for SBTV. 

It's very risky that they only allowed just two days of sales for this week and I cannot understand why they would do this for a major comeback single. As for the performance, Mutya's mezzo-soprano is very rich and smoky, making her vocals really infectious. Keisha's singing has really improved and Siobhan's voice remains powerful as ever. 

The blend of their vocals together during their harmonies was simply flawless. I couldn't fault it even if I tried. The gals will embark on a UK tour in November, performing six shows across the UK, with gigs in Manchester, Glasgow and Bristol. Tickets for the tour go on sale next Friday.