Question: Johnny Hallyday is a French singer and actor once married for 15 years to popular Bulgarian-French singer Sylvie Vartan whose performances often featured what type of choreography? 
Sentence (from "Tony Scotti"): Anthony Joseph "Tony" Scotti (born December 22, 1939) is an American actor, television and film producer, and co-founder of Scotti Brothers Records.
Relevant evidence: No