Julia Roberts' twins had unborn melody

Julia Roberts' new twins, Hazel and Phinnaeus, may wail at times, but their taste in music is sure to be mellow.

The Pretty Woman star relaxed during her pregnancy by singing Joni Mitchell and Dave Matthews songs to her unborn babes.

And when she wasn't crooning to the twins, Roberts says, she was eating "nearly without pause" and revelling in household chores, including scrubbing the toilets - until her "enormous" tummy made it difficult to kneel.

"I'm an old lady," Roberts said a few days before giving birth. "I don't need to seem cool and interesting and crazy and on the edge."