An unreleased Britney Spears song leaked online on Friday, and it may be the sultriest R&B ditty you've never heard. We got a nine-second snippet of "Love" in 2011, but now the full track -- which the YouTube video calls "Welcome To Me" -- is available. It's believed to have been intended for Spears' 2007 album "Blackout," but who knows, maybe it was part of the lost album "Original Doll." Either way, "Love" is a sensual dance-floor anthem in the vein of "I'm a Slave 4 U," peppered with cabaret undertones and Spears' signature whisper grunts. It's divine.