Question: Who was the featured singer in Katy Perry's song "E.T."?
Sentence (from "Katy Perry discography"): American singer Katy Perry has released five studio albums, one live album, two extended plays (EP), 27 singles (including three as featured artist), and five promotional singles. Perry has been certified for 90 million digital singles and 6 million albums in the United States as of August 2017.
Relevant evidence: No