Britney shopping and going to Carl's JR

People.com reports that Brit is still "shocked" about her sister's pregnancy. Apparently she wanted to "try out a dance routine" at Millenium Dance Complex yesterday, but saw the crowd outside and sped away.

A source said, "Britney said that she doesn't want to deal with the media because she is still shocked [about Jamie Lynn's pregnancy news]. She feels that she needs peace and quiet."