Question: Are Karen O and Buster Bloodvessel both singers?
Sentence (from "Buster Williams"): Williams is known for his membership in pianist Herbie Hancock's early 1970s group, working with guitarist Larry Coryell from the 1980s to present, working in the Thelonious Monk repertory band Sphere and as the accompanist of choice for many singers, including Nancy Wilson.
Relevant evidence: No