Katy Perry has attention-grabbing down to a science.

The 24-year-old singer/songwriter ruffled feathers with her 2007 breakthrough Internet single, "Ur So Gay," a tongue-lashing directed at a metrosexual ex that Madonna dubbed one of her favorite songs. The tune launched Perry to instant stardom.

Her bi-curious No. 1 hit "I Kissed a Girl" raised eyebrows, piqued the interest of straight males everywhere and landed Perry on "The O'Reilly Factor."