Review:Making serious waves in America, with a performance with The Roots on Jimmy Fallon recently ticked off their bucket list, boy\u002Fgirl duo Phantogram have had their latest electro-indie single, Mouthful Of Diamonds picked up by BBE. The single is low-key production wise, but hugely memorable thanks to singer Sarah Barthel's cooing vocals, while on the flipside, 10,000 Claps is a gorgeous and beatless union of vocals and jazzy, fidgety sounds and samples.