Came across a great photo of Tila Tequila just before she was attacked at the Juggalos concert. Unforunately it is watermarked, but here is the link.
http://www.egotastic.com/image?path=...e%2 0Juggalos
You can clearly see one nipple tape still in place and a mark where the other has gone missing! Maybe someone can uncover an unwatermarked version. Given that initially she was wearing tape on both boobies, maybe it also qualifies as a celebrity oops moment?