"Hold It Against Me" was a happy accident. It was actually inspired by Katy because I was writing with her at the time and I went in the other room where I was working on Britney in between. She came into the room in some tight, sexy little dress and I jokingly said, "Damn, Katy if I told you you had a nice body would you hold it against me?" I was like, "Bingo!" and I wrote that song.Britney has no idea Katy Perry helped concoct pop magic. "I never actually got to meet Britney when we worked on the album," McKee continued, "which is funny because I’m singing a lot of it. But she knows who I am, and she’s been really sweet about praising me." When writing it, McKee had to get in the right mindset because "Britney Spears is just all sex, all day. It's like, how many sexual innuendos can I come up with?" Let's see if she comes up with anything for Album 8.