Justin Bieber Sings ‘Lonely’ for Prisoners.<br />Last month, Bieber and his pastor visited the California State Prison in L.A. County to spread the gospel to inmates.<br />According to 'TMZ,' Bieber sang 3 or 4 acoustic songs.<br />The tabloid recently received footage confirming the 27-year-old singer sang one of his newer hits, "Lonely.".<br />Bieber was reportedly on the verge of tears during the unplugged set.<br />Afterward, Bieber and his pastor sat with prisoners in the yard to talk about their faith.<br />The whole occasion was reportedly well-received by the inmates