A white sock left with tyre marks after Britney Spears accidentally ran over a photographer's foot is going for more than $1,000 (GBP500) on eBay. The item was left on the pavement after Spears, 25, drove over the paparazzo's foot as she left a medical centre in Los Angeles. Now it is attracting big bucks from memorabilia-obsessed fans. The cash raised by the TMZ.com photographer will go towards the Children's Defence Fund.