If you follow America's Got Talent, then you would have already seen Shiro-A wowing the stage, convincing Piers Morgan to push the golden buzzer.

If you haven't, then you might be in for a treat. This dance group fuses technology into their act to create a sort of an optical illusion.

Here's one of their act, it's called the 'barcode man'. After a while, it becomes harder to figure out who are the real dancers and what are videos of dancers.

Who are they?

Shiro-A was formed in Sendai in 2002, since then, the group is trotting the world to perform.

The group offers an entertainment based on a fusion of techno sound, images and performance.

There is also a meaning to the group's name. Shiro means white in Japanese; the group wanted to use the word white to suggest that the group does not belong to any color. They added A at the end to suggest that the group is unidentifiable.

Performances at America's Got Talent

With their awe-inspiring and dynamic acts, Shiro-A has stunned the audience and judges alike at America's Got Talent

When Shiro-A made it through round 3, one of the members FUMIYA commented on the group's official blog:

Here are Shiro-A's performances in rounds 2 and 3:

Round 2

Round 3

The combination of sound, vision and motion really catches attention. I wonder how much work they have put in to achieve this.