Britney Spears became fraught with worry in the aftermath of Hurricane Katrina hitting America's Gulf Coast, because she couldn't contact her Louisiana-based family for four days.

The TOXIC singer, who was in California with her husband Kevin Federline awaiting the birth of her son Sean Preston when the disaster struck at the end of August (05), had to wait for power to be restored in the devastated region before hearing that her relatives were in good health.

Her younger sister JAMIE LYNN says, "When Katrina hit, I was home with my mom and some of my aunts, but Britney and Kevin were in LA and weren't able to talk to them for about four days. That was hard.

"It's really scary not being able to call your family and let them know you're OK."

Jamie Lynn recently travelled to Mississippi to help the hurricane victims.