Troubled pop star Justin Bieber was warned by his jet captain to stop smoking marijuana on board, according to reports.

The Boyfriend singer was flying from Canada on Jan. 31 to attend the Super Bowl in New Jersey on Sunday where it was reported that his private jet was targeted for drugs when it landed.

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While the Drug Enforcement Administration searched the plane, they apparently didn't find any illegal substances. Some sources also reported that the jet's captain allegedly warned Bieber and his entourage about doing drugs on board.

"The captain of the flight stated that he warned the passengers, including Bieber, on several occasions to stop smoking marijuana," the official report stated, according to NBCNews.com.

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Bieber has been through a lot lately, and more was added to his plate with a controversial picture of him biting a stripper's nipple. The Daily Mirror posted the photo on Monday of the singer and his friend Khalil Sharieff with their teeth around each of the stripper's nipples.

TMZ also reported that a source said the woman was "hired to perform" for the singer and his friends at a recording studio in Los Angeles.

These new reports come after the pop star was arrested for a DUI and drag racing as well as getting sued by his bodyguard and a possible sex tape. However, Bieber's mother recently said that her son is "not out of control."

"He has always been someone who has to do things his way," Pattie Mallette reportedly told the Daily Mirror. "He will do the right thing and he will come out on top."

Tags: Justin Bieber