I love the bobs! I think each one suits each girl very well, and it reflects their personality.
Personally, I love how Britney cut her hair. She was dying it all sorts of colors, and it seemed to get longer and longer as her pregnancies continued. Now that she's lost her baby weight and some *other* (ahem)...I feel like the bob is a fresh new start for her! I especially love how she's blonde again--really lightens everything up!