Justin Bieber
Justin Bieber Reuters

Pop star Justin Bieber has expressed a desire to shoot a music video in space.

The 19-year-old singer, who signed up to go into space with Virgin Galactic, was responding to Virgin Group founder Sir Richard Branson's post on Twitter. Bieber enrolled in the space programme, with his manager Scooter Braun.

"Great to hear @justinbieber & @scooterbraun are latest @virgingalactic future astronauts. Congrats, see you up there!" Branson tweeted.

"Let's shoot a music video in space!" Bieber replied.

Last year, during an appearance on the television show Daybreak, the Boyfriend singer revealed that if he hadn't become a musician he would have become an astronaut.

"I would probably be an astronaut because I want to go to space," Bieber said, adding, "I don't know if I want to spend that much money."

Other celebrities who have lined up for the space trip via Virgin Galactic commercial space flights, which are slated to begin next year, include Ashton Kutcher, Tom Hanks, Brad Pitt, Angelina Jolie, Kate Winslet and Leonardo DiCaprio.

NASA Responds to Bieber's Wish for Music Video in Space

Back in February, when Bieber tweeted: "I wanna do a concert in space", NASA responded by writing: "Maybe we can help you with that. 'All Around the World,' next off it?"

And last year senior astronomer Seth Shostak, from the Search for Extraterrestrial Intelligence (SETI) Institute, said he too supported the idea of sending the Baby singer into space.

"My suggestion is, be sure to send Justin Bieber on one of these flights early on," he said during a presentation at the 2012 Next-Generation Suborbital Researchers Conference, "If there's more interest, there are more customers. If there are more customers, there's more technical development. It's a positive feedback loop, and obviously that's good."