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? 

Context paragraphs:
Sylvie Vartan discography: This page presents the discography of French singer Sylvie Vartan.

Le Lido: Le Lido is a cabaret and burlesque show located on the Champs-Élysées in Paris, France.  It opened in 1946 at 78 Avenue des Champs -Élysée and moved to its current location in 1977.  It is known for its exotic shows including dancers, singers, and other performers.  Famous names have performed there including: Edith Piaf, Siegfried and Roy, Sylvie Vartan, Johnny Hallyday, Maurice Chevalier, Marlene Dietrich, Eartha Kitt, Josephine Baker, Kessler Twins, Elton John, Laurel & Hardy, Dalida, Shirley MacLaine, Mitzi Gaynor, Juliet Prowse and Noël Coward.

J'ai un problème: "J'ai un problème" is a French language song, a duet by Sylvie Vartan and Johnny Hallyday.  However, the single cover credited a shortened version of their name as Sylvie & Johnny.

Johnny Hallyday: Johnny Hallyday (] , stage name of Jean-Philippe Smet, born 15 June 1943) is a French singer and actor.  He was married for 15 years to popular Bulgarian-French singer Sylvie Vartan and the two were considered a "golden couple" for 20 years.  Hallyday has completed 181 tours, had 18 platinum albums, and has sold more than 110 million records worldwide, making him one of the world's best-selling artists of all time.

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.  He is married to French singer Sylvie Vartan.

Jean-Jacques Debout: Jean-Jacques Debout (born 9 March 1940, in Paris) is a French singer-songwriter.  In addition to his albums, he has written for a number of renowned artists like Johnny Hallyday, Sylvie Vartan, Dalida, and Chantal Goya.  He has also composed a great number of films.

Didier Barbelivien: Didier René Henri Barbelivien (born 10 March 1954 in Paris) is a French author, lyricist, songwriter and singer.  Beginning in the 1970s, he wrote a number of successful songs for artists such as: Dalida, Johnny Hallyday, Michel Sardou, Daniel Guichard, Claude François, Gilbert Montagné, Sylvie Vartan, Patti Layne, Gilbert Bécaud, Enrico Macias, Demis Roussos, Mireille Mathieu, Hervé Vilard, Michèle Torr, C. Jérôme, Christophe, Julio Iglesias, Sheila, Nicole Croisille, Patricia Kaas, Eric Charden, Jean-Pierre François, Michel Delpech, Philippe Lavil, Elsa, Gérard Lenorman, Ringo, Garou, Corynne Charby, David and Jonathan, and Caroline Legrand among others.

David Hallyday: David Hallyday (born David Michael Benjamin Smet; 14 August 1966) is a French singer, songwriter and amateur sports car racer.  He was born in Boulogne-Billancourt and is the son of the French singers Sylvie Vartan and Johnny Hallyday.  David Hallyday is a first cousin of actor Michael Vartan.

Sylvie Vartan: Sylvie Vartan (born Sylvie Georges Vartanian; 15 August 1944) is a French singer and actress.  She is known as one of the most productive and tough-sounding yé-yé artists.  Her performances often featured elaborate show-dance choreography, and she made many appearances on French and Italian TV.  Yearly shows with then-husband Johnny Hallyday attracted full houses at the Olympia and the Palais des congrès de Paris throughout the 1960s and mid-1970s.  In 2004, after a break in performances, she began recording and giving concerts of jazz ballads in francophone countries.

The Adventures of Jodelle: The Adventures of Jodelle (original title "Les Aventures de Jodelle") is a 1966 French erotic comic drawn by Guy Peellaert and scripted by Pierre Bartier.  Drawings and screenplay were deeply influenced by Pop Art.  Many of the characters looks were taken from public pop figures of the past and present; Jodelle herself looks like French singer Sylvie Vartan, stereotyped as the girl next door "fiancée", while other characters are look-alikes of Emperor Augustus, The Beatles, Pope Paul VI, James Bond, Marquis de Sade, Frank Lloyd Wright's architecture of the Solomon R. Guggenheim Museum, and Jesus Christ.  In a Pop version of Imperial Rome, neon ads promote "stripteases and Christian slaughters."

Supporting paragraphs: Johnny Hallyday Sylvie Vartan
Answer: show-dance