Question: Which highest grossing tour of 2011 featured someone from the audience performing a lap-dance?
Sentence (from "Skin (Rihanna song)"): Musically, "Skin" is a R&B song that contains influences from pop, dance-pop and dubstep genres, whilst lyrically, the song is about being in a relationship with someone and only wanting to feel their skin close to the protagonists.
Relevant evidence: No