Singer Britney Spears arrives with an unidentified woman at Barrigona beach on the Pacific coast in Samara.[Agencies]

Britney Spears' plans for a family barbecue with her two sons were ruined because of bad weather this weekend.

Britney Spears had to cancel a family party with her sons this weekend.

The troubled singer planned to host a pool party during a visit with her sons, Sean Preston and Jayden James, but bad weather spoiled the feast.

A source said: "She started setting up around 1pm for what was intended to be an all-out bash."

Britney's dad Jamie, who is a trained cook, had planned a barbecue by the pool for the entire Spears family, but the arrangements had to be cancelled when it began to rain and temperatures dropped.

Shortly after 5pm, Britney's sons returned home to their father Kevin Federline and Jamie also returned to his house as their day drew to a close.

The singer was stripped of visitation rights to two-year-old Sean Preston and one-year-old Jayden James in January after she was ruled to be a danger to herself and the children.

In February, the ruling was amended to allow occasional supervised visits with her sons, and a further hearing earlier this month saw her permitted to spend more time with them.

Another hearing is due to take place in July.