Question: Who sings in the band Tokio Hotel, Bill Kaulitz, Cristina Scabbia or both?
Sentence (from "Cristina Scabbia"): Cristina Adriana Chiara Scabbia (] ; born 6 June 1972) is an Italian singer and lyricist, best known as one of the two vocalists in the Italian Gothic metal band Lacuna Coil.
Relevant evidence: Yes