A post on her official website reads: "Ever dream of being in a Beyonce music video? Now's your chance to make sure that dream doesn't turn into the best thing you never had. We're making an alternate fan video for Beyonce's hit single Best Thing I Never Had, and we want home videos and photos from your joyous wedding day, or from a prom you'd rather forget. Send us your videos or photos and who knows where you might see them next..."
The deadline for submissions is 12 August (11).