Joshua Charlie Joseph Bradley, also known by his online identity Zerkaa or his stage name Josh Zerker, is an English internet personality. He is a founding member of the YouTube group the Sidemen, which includes Bradley, Vikram Barn (Vikkstar123), Tobi Brown (TBJZL), Harry Lewis (wroetoshaw or W2S), Simon Minter (Miniminter), KSI (KSI) and Ethan Payne (Behzinga).