I love Britney, I really do.
Her sister, eh, not so much. It sucks that this happened to her but its an opportunity to show her fans, these other sixteen year old girls, that there ARE consequences to having sex (especially being underage.)
I'd rather her get pregnant than get AIDS, I'd rather her be pregnant then on drugs, then commiting DUI every other night. This is a way for her to teach teenagers a lesson. Hopefully she'll learn from it and clean up her act. Hell, take Nicole Richie - since she's been pregnant she's cleaned up quite a bit. Hopefully Jamie will do the same.