Spears poses with sons in cheerful Christmas card

Britney Spears has wished friends, family and her loyal fans a Merry Christmas with a holiday card - which pictures the star grinning with her two sons.

The cheerful photo shows three-year-old Sean Preston and his little brother, two-year-old Jayden James, wearing sweater vests and glasses as they sit on their mum's lap in front of a Christmas tree.