Pop singer Justin Bieber's capuchin monkey, Mally, sits on the head of an employee at an animal shelter in Munich on Tuesday, April 2, 2013. German customs placed the monkey in quarantine on March 28 when Mr. Bieber failed to produce required vaccination and import papers for the animal after landing in Munich. (AP Photo/Matthias Schrader)
Teen heartthrob singer Justin Bieber boards his tour bus outside the Grand Hotel in Stockholm on Tuesday, April 23, 2013. Swedish police on Thursday said they had found drugs on the bus but had no suspects and were unlikely to pursue the case further. (AP Photo/Scanpix Sweden, Leo Sellen)
** FILE ** This March 19, 2013, file photo shows Canadian singer Justin Bieber performing during a concert at Bercy arena in Paris. Bieber has visited the Anne Frank House in Amsterdam, with a museum spokeswoman saying the Canadian pop star wrote in the guestbook that he hoped Frank "would have been a Belieber" if she had lived. (AP Photo/Francois Mori, file)
** FILE ** In this Monday, March 4, 2013, file photo, Canadian singer Justin Bieber performs at the O2 Arena in east London. Bieber is recovering after fainting backstage at a concert in London. (Photo by Joel Ryan/Invision/AP, File)
** FILE ** In this Nov. 18, 2012, file photo, Justin Bieber, right, and his mother, Pattie Mallette, arrive at the 40th Anniversary American Music Awards, in Los Angeles. (Photo by Jordan Strauss/Invision/AP, File)
A roadside memorial marks the site at which paparazzo Christopher James Guerra was killed by a car while he darted across the street after taking pictures of singer Justin Bieber's Ferrari along the 405 freeway in Los Angeles on Wednesday, Jan. 2, 2013. (AP Photo/Jae C. Hong)