Washington, Oct 26 Late Michael Jackson might have named mother Katherine as the caretaker of his three kids, but they call aunt Janet Jackson their 'mama'.

The 'Thriller' hitmaker's elder sister La Toya Jackson had also expressed her desire to play maternal role in the lives of kids Prince, Paris and Blanket.

But, according to Britain's Daily Mirror newspaper, Janet is the relative the youngsters have grown closest to - they already call her "Mama".

"Katherine does the best she can for those kids. But it's really Janet who has become the main force in their lives. They absolutely adore her," Contactmusic quoted a source as saying.

"Janet is really careful not to step on her mother's toes because there has been a bit of a battle among the Jackson women over who should raise the kids," the source added. (ANI)