Pop princess Britney Spears, who had to battle fame at an early age, doesn't want her two sons to enter showbiz until they become responsible grown ups.

The Toxic hitmaker, who has sons Sean Preston, four, and three-year-old Jayden James with her ex-husband Kevin Federline, is terrified that they would want to follow her footsteps into the entertainment business, Contactmusic reported.

"If my sons told me they wanted to be in the entertainment business, I'd lock them in their rooms until they turned 30," said Spears. Spears has also admitted she is "dreading" the day when the youngsters will start asking her questions about how they were made.

"I'm dreading the moment when my sons ask me how babies are made," said Spears. The 28-year-old mother is spending lots of time with the her sons and is enjoying how "cute" they are. "Things are pretty quiet right now. I've been spending a lot of time at home with my boys. They just started karate class, which is super cute!" said Spears.