Echosmith is a four person sibling act - three brothers and their vocalist sister put together a little family band out in LA. They are a very, very young group. The eldest brother, Jamie, is just 20 years old, while the youngest brother, Graham, is still 14. The third brother, Noah, and their sister, Sydney, are 17 and 16, respectively.
That means all but one member is still in high school, and it shows in their music. They have just released their first album, Talking Dreams, and it sounds, appropriately, like a high schooler's attempt to produce alternative pop music.