Britney Spears was forced to end a number of friendships when she became pregnant, so she could embrace her new life as a mother. Besides scaling down her social life, Spears confesses many close pals got left behind when she hooked up with husband Kevin Federline. She says, "I have had to cut quite a few people out of my life over the past couple of years. I guess it's been kind of weird. That transition in my life was kind of hard, I think it's part of growing up."