Lisa Marie Presley: It's Twins!

Lisa Marie Presley is going to have an extra special delivery — Star can exclusively report that the singer is pregnant with twins!

As we told you last week, the daughter of the late Elvis Presley and Dancing with the Stars contestant Priscilla Presley is expecting with her fourth husband, Michael Lockwood. But now we can reveal that she's four and a half months pregnant with twins and at least one of the babies is a boy.

"Michael told me that he and Lisa have been trying to get pregnant for about a year," a neighbor in Hidden Hills, Calif. tells Star. "He also said that they had a sonogram two weeks ago, and [one] baby opened its legs, and they saw something!' Michael was beaming."

However, Lisa wasn't beaming when she announced her pregnancy on her MySpace page after being photographed looking plump in a yellow hoodie.

"Ladies, You KNOW if you were pregnant and you felt you were expanding uncontrollably by the moment... you would be mortified as well," she wrote.

Lisa Marie — who has two teenage children with first husband Danny Keough — is "having a really hard time" with her pregnancy, an insider tells Star. "She has gained a lot of weight and feels terrible about herself. She can't stand to look in the mirror. It makes her miserable. She can be nice one minute but then horrible the next. It's difficult to be around her."

Find out more about Lisa Marie's pregnancy — including her difficult attempt to get pregnant as well as her cravings in the March 24 issue of Star, on sale now.

What should Lisa Marie name her babies? Offer suggestions below.