Britney Spears shows off her latest alias: "brunette shopping in L.A." Maybe we've been watching too many "Alias" reruns (damn you, Netflix!!), but is anyone else getting a whole Sydney Bristow/incognito vibe from Britney Spears lately? First, she debuted her new brunette look at Elton John's Oscar viewing party (HELLO, Sydney's hair color!), and she's [...]