"I certainly have an OCD side when I'm on tour... What are my areas of OCD? Well, if there''s broken make-up in my purse I freak out. Also if I am around household pets and some of their fur comes off on my cardigan, then I can get pretty sharp," the Daily Express quoted her as telling Q magazine.
"But my worst one is if I see a pair of sunglasses with fingerprints on them. Truly, I cannot stand it. I go ape. Oh my God, I can't breathe! Wipe them clean! Agghhh," she added.