Britney Spears left the dentist with some tooth whitening products to bring home yesterday afternoon in LA. She was back to her super short skirt and brown boot loving, but there's really nothing to complain about coming from the Spears front these days. In fact, it's been a banner week for Brit, who helped bring How I Met Your Mother its highest ratings ever with her cute performance. Maybe it will lead to a spot on 30 Rock? Miley may be making her way up the fame ladder, but Brit's still at the top. Plus, now that her little sister Jamie Lynn is engaged, she's got a wedding to help plan — she's gotta have some good sisterly advice after her two, right?