Golden Big Brother tickets could be sold on eBay for up to £10K, producers fear.

100 tickets are being placed in KitKat chocolate bars, and lucky finders will be entered into a lottery to become Big Brother 7 housemates.

"Millions of die-hard fans will pay the earth to get a chance to be on the show," a source told the Daily Star. "It's a once in a lifetime opportunity to queue-jump and get in that house to become famous. At £10,000 it's worth risking it."

A spokesman added, "We would hope anyone who finds a golden ticket in their KitKat bar will enter into the spirit of Big Brother."