VIDEO : Justin Bieber Is Under Fire in San Francisco for Illegal ?Purpose? Graffiti Ads

Justin Bieber is in legal trouble again ? this time with the city of San Francisco. The singer?s latest album Purpose was illegally marketed on the sidewalks of SF, and the city is clearly pissed about it. Yesterday, the city attorney sent a letter to Bieber?s music publisher (Def Jam and Universal Music Group) demanding they help determine who?s responsible for the alleged guerrilla-marketing. The graffiti in question reads ? Justin Bieber Purpose #Nov 13.