Katy Perry is in the final stretch of her first pregnancy and “keeping busy” until her and Orlando Bloom’s baby girl arrives.“Katy feels like she is ready to give birth and embark on her journey of motherhood,” a source exclusively tells Us Weekly. “She feels like this is exactly where she wanted to be and what she was destined to do.”The Grammy nominee, 35, “has been trying to get as much work as possible in” during her pregnancy, the insider adds.