Bonnie McKee ("Hold It Against Me," "Inside Out," "How I Roll") told Billboard at the 2013 Grammys Britney hit her up to work on Album 8.
"Britney Spears called me, but that doesn't mean anything yet."
When Britney hits you up it DEFINITELY means something!
Bonnie recently revealed Katy Perry was her initial inspiration when writing "Hold It Against Me" off Femme Fatale. Yeah, we could've gone forever without knowing that.