What does Alexandra Burke mean when she says 'Red One' in her song 'Broken Heels'?

This vintage Soul number was co-written and produced by Lady Gaga's collaborator RedOne. Burke told Pop Justice about working with the Moroccan/Swedish hitmaker: "I've got to say, Red was the one that basically got my personality out first. Then everything else slipped into place like a puzzle. Red really started it off for me. He had songs already ready for me, right? And then I walked in, and he met me, and he was like, 'scrap every song we've just prepared for you, we're going to start from scratch, because you're not the person I thought you would be.' So then he wrote according to my personality."