"You don't think, 'Does my belly or my bum look big'. You just think, 'Wow, I'm making a baby'" The Sun quoted Klass, as saying.
"And the shoot was great fun. They had my fan on me and my chips by the side," she added.
Myleene also revealed that that her daughter is actually due in August, instead of September.
Meanwhile Myleene, who conceived the baby with fiance Graham Quinn will release her new album Music For Romance, on July 2.