Geri Halliwell visited the London police this weekend to tell them she believes she is being stalked. The Spice Girl alum has not made a public statement about her fears and it is not known whether she has made a formal complaint. A police source said, "Geri believes she has a stalker and is absolutely terrified. She has seen the same person following her several times and it is making her very jittery. Officers had to calm her down. As a new mum it must be pretty frightening and she doesn't want to leave anything to chance - she is being ultra cautious for the sake of baby Bluebell."