Beyonce is the latest star to launch a fan-video contest – in her case, she's asking fans to “adhere precisely” to the routine from her Single Ladies video. The winner gets $2,500 and their video shown during Beyonce's upcoming world tour.However, the contest is strangely old-skool in the manner of entries – they're asking for submissions on DVD-ROM discs, rather than uploaded to YouTube or any other site.Naturally, there's a caveat in the terms & conditions: “All video submissions become the property of Music World Entertainment/Sony Music Entertainment”. So cheap footage for anything else Beyonce's team wants to do on the video side of things…