When Jessie J arrived at GLAMOUR HQ for her guest edit, the first thing we noticed was her picture-perfect make-up. We assumed she'd had a prep team of at least four putting together her look, so imagine our surprise when she revealed that not only is she now styling herself, she'd also done her own make-up (we've already added that perfect summer pink lipstick, MAC Candy Yum Yum, to our shopping basket).