Britney Spears has married a childhood friend in Las Vegas by mistake, say internet news reports.
The 22-year-old superstar tied the knot with Jason Allen Alexander, 22, on Saturday, according to celebrity news web site People.com.
But the marriage was a joke that went to far, and the unhappy couple are trying to get it annulled, which would mean it officially doesn't count.
Britney released her fourth album, In the Zone, in November.