Smith performs a cover of Whitney Houston's 'How Will I Know'
Frontman said he hopes 'it's not a joke to everyone'
The frontman makes the revelation in a new short film called 'Road Dawgs'
Frontman says song came from 'the darkest place'
Band say the short TV spot 'really did change our year'
They will play the Camden venue on March 30 and 31, 2015
They will play The Roundhouse on March 31, 2015
The five-track EP was recorded at SXSW festival in March
The band have mostly sold out their summer tour dates