Sixteen... or six? Justin Bieber draws on his face, plays with toys and throws a tantrum at upmarket London restaurant

By GEORGINA LITTLEJOHN and ANDREA MAGRATHJust a teenage boy: Justin Bieber acted like just a regular immature youngster as he left upmarket Indian eatery La Porte Des Indes last night He is nominated for two Grammy Awards, sold millions of albums and is the biggest pop star in the world right now.But Justin Bieber is clearly still just a teenage boy, prone to bouts of immaturity.The Baby singer