Mother-to-be Lisa Marie Presley is suffering from a very healthy craving during her pregnancy - she is addicted to fruit smoothies. The daughter of rock 'n' roll king Elvis Presley is four-and-a-half months pregnant with twins - her first with fourth husband Michael Lockwood. But the star is pleased that she is craving healthier food this time around. She says, "Fruit - it's boring by that's what I want. Any fruit: fruit smoothie, fruit juice - it's good. So far the pregnancy has been very easy." Meanwhile, Lockwood is suffering from a pregnancy of his own. Presley adds, "(He) has all my symptoms. He feels like his belly is getting big and he has the same appetite I have. He's having reflux and was nauseous the other day. It's funny."