• Justin Bieber took a selfie while he was in Boston park.

Justin Bieber took a selfie while he was in Boston park. (Photo : Facebook/ Justin Bieber)

On May 11, Wednesday, the "Sorry" singer Justin Bieber returned to the Boston Public Garden and sat straddling a branch of a tree. The news came days after he walked barefoot, fed squirrels, and warned fans not to take pictures with him.

For a second day in a row, Bieber enjoyed his time alone in the park. He listened to "Scarborough Fair" music playing in the background, had his headphones and waved his arms up in the air. It was a strange Bieber behavior in Massachusetts, according to PEOPLE.

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During his concert in Boston on May 10, Tuesday, people said that there was something odd with Bieber's behavior. One fan claimed that the singer was full of emotion and at one time, he even stopped singing. "He was in a glass box onstage. He was literally in a glass case of emotion," a fan told the magazine.

The same day Bieber was seen first time at the park, he alarmed fans to stop taking pictures with him. He said he was finished taking pictures with his followers because they don't recognize him as a human. It made him feel like a zoo animal, and he wanted to keep his sanity, Bieber explained in his Instagram post.

Bieber stayed in Four Seasons Hotel Boston as he continued leg of his "Purpose World Tour." His fans camped outside the hotel and waited all the time to see the pop star.

The singer's strange behavior was not only seen this week. Concerned fans expressed their worry on Bieber, who claimed that he was struggling and their demands were making it more complicated for him.

Last week, Bieber broke into tears when he sang "Purpose" during his Philadelphia "Purpose World Tour." He sat on stage, stopped singing as he fought back tears, Daily Mail reported. His fans then reassured him by saying they are with him.

Bieber's strange ways are not new as he has been showing eccentric kind of behavior since March. That time, he canceled all his meet and greet with fans and claimed they left him emotionally drained.

Watch the video below of Bieber recorded this week at the Boston public garden: