U.S. Customs officials spent more than five hours interigating Justin Bieber on Thursday after he landed at LAX airport after an Air Singapore flight from Tokyo. The 20-year-old Canadian pop star got in around 1 p.m. Pacific Time he was finally seen leaving the airport around 6:30 p.m. Bieber, Had no comment as he left. However, ABC News says that it's not uncommon for customs and immigration officials to question non-citizens who arrive in the U.S. and have open legal proceedings. Bieber has recently had problems with the law in Florida, California and in Toronto,Canada.