The `Gravity` hitmaker - who in the past has confessed to never having had a proper boyfriend - knows it`s important to strike a "happy medium" between her career and personal life, but admits she would struggle to fit a man into her busy schedule. She explained: "I think it`s important to keep a happy medium - a good balance - because I love my friends so much and I think if I didn`t get to see them, then I would go a bit crazy. "Do I have time for romance? I don`t know, maybe a little bit, I`m not sure. I`m not good at these questions." The blonde beauty appeared as a guest judge on Simon Cowell`s pop star search show `The X Factor` earlier in the year but has been so busy recently she hasn`t even had the chance to watch the series. Speaking about her `X Factor` appearance on ITV1`s `Lorraine` show, she said: "To be honest with you, I haven`t actually watched any of the episodes apart from the one that I was judging at - I`ve been so busy."