The Superficial posts a reader-submitted nipple-exposing photograph of Britney Spears, along with information about its provenance and a conjecture about its authenticity: "The giant X suggests that it is indeed an outtake, and the saggy freckly cleavage suggests that it is indeed Britney Spears' chest." Sounds good enough for us. (We'd submit it to the same sort of pixel-level analysis used on the alleged Anna Kournikova nip slip photo we posted about last week, but is 1/4" of nipple really worth it this early on a Monday morning? Er, don't answer that.)
"Britney Spears Nipple Slip Outtake" (The Superficial - thanks Karl)