Pop star Justin Bieber wants fans to show respect to him whenever they ask him for a photograph.

The 21-year-old, who is here to promote his latest single "What do you mean?", took to Snapchat on Sunday to address his fans' habit when they asked him to take photographs together, reports aceshowbiz.com.

The Snapchat video did not show Bieber anywhere but it showed the city's scenery outside a car's window.

While the camera was capturing the scenery of the city, Bieber's voice could be heard talking about how he wanted to be treated if his fans wanted to take photographs with him.

"The way you ask or approach me when you want a photo with me is going to determine if I take a photo or not," Bieber warned.

"If I'm walking somewhere or arriving somewhere and you guys are asking me to take a photo, if I don't respond, if I continue to keep walking, the likelihood is that I probably don't want to take a photo at that moment," he explained.

The singer then addressed his fans' habit when they asked him to take photos together.

"Now, if you start screaming louder that's not going to make me take a photo more. I want to enjoy the moment like you're enjoying the moment but I can't enjoy it if I'm not feeling like there's any respect given to me that moment," he said.