>> three weeks after the second kid was born, kevin federline took a private jet to vegas.ap career. this was creating problems in their relationship. >> less than two months after giving birth to her second child, britney filed for divorce. >> she is still nursing a 2 month old. kevin immediately requests full custody and they are splitting custody while this is all being adjudicated. and this is when things really started to get really bad for britney. she had these huge chunks of the week she wanted to be with her kid and couldn't and she filled that time with whatever any 25-year-old might, going out. >> the paparazzi hounded her. >> january 16th, 2007 while filming a shocking episode. >> there's a lot of buzz about the bizarre actions of britney spears. >> she shaved her head leaving many wondering if she lost more than her hair. five days later, another stunning incident. >> she went over to kevin's house and wanted to see the kids but kevin didn't let her in the house and she buzzed the door and you could hear i'm not letting you in. and then she would call him on th