Taylor Swift welcomes her 'Swifties' into the <em>Blank Space</em> mansion with a cool new app!

Los Angeles - Taylor Swift has launched an app to enable fans to delve into her Blank Space music video.

The 24-year-old singer unveiled the American Express Unstaged Taylor Swift Blank Space Experience App on Tuesday.

Thanks to a 360-degree experience by clicking on their screen, it enables her supporters - known as Swifties - to travel around the mansion featured in her video from her latest single.

Joseph Kahn, who directed both the video and the app experience tweeted:

Have you downloaded the #AmericanExpress interactive app yet? How many objects have you found on the #BlankSpaceExperience?

— Joseph Kahn (@JosephKahn) November 12, 2014

Speaking to website Mashable, Joseph Kahn said: "The app is a cross between theatre, a music video and a video game."

"I had to direct it more like a stage show than a music video so the audience can choose any way they want to look; we had to create reasons for them to turn their head or look up or look down."

Users of the free iOS and Android app are tasked with collecting 41 objects in the room in order to finish the game, including a pair of binoculars to get a better look at Taylor and her fictional love interest from the Blank Space music video, which was released on Monday.

I can't find all 41 objects in Taylor's @AmericanExpress #BlankSpaceExperience & I fricking made it haha. Download: http://t.co/8K9p84MTeZ

— Joseph Kahn (@JosephKahn) November 12, 2014

Joseph added: "Let's keep in mind that all of this technology is great, but ultimately there's a story.

"That's the key, that's what makes it interesting is that we're tracking the story of her and this guy going on this great date and then her going psychotic. We're a fly on the wall."

App users can also follow Taylor around as she sings Blank Space and even pick up the mobile phone featured in the video, which appears on her fifth studio album 1989.