SHERMAN OAKS, February 16, 2007 - Britney Spears is back in the U.S., and she's sporting a brand new look. Spears was photographed at the valley tattoo shop "Body and Soul" in Sherman Oaks, getting a tattoo reportedly of a pair of red and pink lips on her wrist. But the biggest change to the pop singer's style? She shaved her head bald. Spears could be seen inside the tattoo parlor with her head fully exposed, but as she left the shop she was led by her bodyguard straight to a waiting SUV. Spears had her head covered with a...