If sources are to be believed, Drew Barrymore is expecting a baby girl.The actress, who is pregnant with her first child with fianc Will Kopelman, is delighted at theprospect of becoming a mother. ''She's having a girl. She's so excited,'' a source told Life & Style.In the past, the Going the Distance actress had claimed she would like to have a baby girl. Shesaid: ''I feel I'm sort of surrounded by children and I do feel I'm going to have a child at somepoint. Maybe a little girl. I feel it, but I don't know if it's going to happen. We'll just have to waitand see.''