Musicians and bands have been adored since the first notes were recorded, but it was Beatlemania in the '60s that heralded the birth of the SUPERfan - a breed of music obsessive that literally worshipped their idols.

Superfans examines the crazed followers and fan groups that surround the modern music scene in a witty, fun and tongue-in-cheek way. From Beyonce's Beyhive, the Britney Army, Gaga's Little Monsters, Nicki Minaj's Barbz to Justin Beiber's Beliebers - author Tobias Anthony goes deep into these fan groups to see what makes them tick.