Bieber Pranks Manager With Sham Tweets Victor Chavez/WireImage/Getty Images Pop heartthrob Justin Bieber has hijacked his manager's Twitter account and seized the opportunity to post a few cheeky tweets on Scooter Braun's behalf. hahaha. look who left their twitter open by mistake! priceless. He is the greatest. I wish i had more hair," Bieber wrote Sunday after reportedly finding Braun's account open. Bieber retweeted that message from his own account, sending it out to his 23 million followers. But he wasn't done. Also tweeting as Braun, Bieber wrote: "i wet the bed...often"; "my name is Scooter...im over 30 and I still have the name of a toy" and "#PRANKED." Braun, who has 1.6 million followers on Twitter, seemed to have a sense of humor about his protégé"s prank. He tweeted: not cool. for my friends..that wasnt me. 18 year old kid snatched up my twitter. I apologize. Im back. I only wet the bed sometimes. "debating if i should erase the tweets of my being pranked. it is kinda funny but my grandmas check my twittre and they wont get it," he added. Bieber may have had his fun, but the "Boyfriend" singer better watch his back. "and yes...revenge will be mine," Braun vowed on Twitter. Bieber is touring the world to promote his upcoming album "Believe." More than 210,000 people flocked to his free concert in Mexico City on Monday.