Beyonce's fans star in her new video

The singer's asked fans to appear in "Best Thing I Never Had" video

Beyoncé is to make an alternative version of the video for the single and wants her fans to star in it.

The star has asked her followers to upload photos or clips of their weddings or proms on YouTube and Flickr by August 12.

Beyoncé will use her favourite ones in the new video.

"Best Thing I Never Had" is the second single from her number 1 album "4".