A truant officer comes into Arnold's, telling Fonzie that his cousin Chachi has been skipping school and selling ties to various people.
 Fonzie tells Chachi that he should stay in school because "stay in school is cool," though Chachi says school is boring.
 Richie tells Chachi he needs someone to tutor and Fonzie tells Chachi that he can have a job at his mechanic shop.
 Later, Chachi is paired with Joanie, who is tutoring him as suggested by Richie.
 However, as soon as Joanie's parents leave the room, Chachi starts to hit on Joanie and she threatens to tell her father and call Fonzie, so Chachi starts to work and tells Joanie that he has some sample questions that he needs to work on.
 Marion calls Joanie upstairs so she can help her with her dress.
 Chachi then gets on the phone with his friend Tony, telling him he got all the answers for the test.
 Chachi gets 100 on his test and Fonzie gives him a job and his first yellow mechanic hat, given to him by a person named Boris when Fonzie was able to fix his first car at only 7 1/2 years old.
 Chachi leaves Fonzie to do his work.
 Richie and Joanie come inside to tell Fonzie that Chachi got suspended from school for two weeks and cheated the answers out of her, which also got her suspended later.
 Chachi comes in, is confronted by Fonzie, and angrily storms out of the shop.
 Back at the Cunningham house, Howard & Marion tell Fonzie that he should talk to Chachi, but Fonzie says that it is against the Fonzarelli Code.
 Richie talks to Chachi at Arnold's, trying the buddy, anger, and truth routines.
 Richie tells Chachi that he should sell himself out to the principal and tells Fonzie he should give Chachi his job back.
 Chachi has a second interview and he apologizes to Fonzie and is given another shot.
Lauren Elaine (born November 7, 1983) is an American fashion designer, actress, and model.
 As a designer, she has appeared as a featured guest on "America's Next Top Model" as well as Bravo's "The Rachel Zoe Project".
 She is also the first designer to ever present a couture runway show at sea, hand-selected by Crystal Cruises.
 As an actress, she has appeared in Fox Searchlight's "The Ringer" (as "Brandi"); all of Dierks Bentley's #1 country music videos (as "Becky"), beginning with "What Was I Thinkin'"; Miramax's "Sin City"; and as a model in fashion campaigns for Chanel and Nordstrom .
French house is a style of house music originally produced by French artists, a popular strand of the late 1990s and 2000s European dance music scene and a form of Euro disco.
 The genre has also been referred to as "French touch", "filter house" and "tekfunk" over the years.
 The defining characteristics of the sound are heavy reliance on filter and phaser effects both on and alongside samples from late 1970s and early 1980s American or European disco tracks (or original hooks strongly inspired by such samples), causing thicker harmonic foundations than the genre's descendants.
 Most tracks in this vein feature steady 4/4 beats with a tempo range of 110–130 beats per minute.
Sofia Richie (born August 24, 1998) is an American fashion model.
 She has been featured in campaigns by a number of major brands including Tommy Hilfiger, Michael Kors and Chanel.
 She is the youngest daughter of singer and songwriter Lionel Richie and sister to fashion designer and television personality Nicole Richie.
Vincent Pierre Claude Belorgey (born July 31, 1975), known as Kavinsky (sometimes stylized as KΔVINϟKY), is a French house artist whose production style is very reminiscent of the electropop film soundtracks of the 1980s.
 Kavinsky claimed that his music is inspired by thousands of movies he watched as a young boy and that he has cherry-picked the best parts from them, consolidating them into one concept.
 Kavinsky has been compared to many similar French house artists including Daft Punk and Danger.
 He achieved greater mainstream recognition after his track "Nightcall" was featured in the 2011 film "Drive."
The House of Worth was a French house of high fashion that specialized in haute couture, ready-to-wear clothes, and perfumes.
 The historic house was founded in 1858 by designer Charles Frederick Worth.
 It continued to operate under his descendants until 1952 but finally closed in 1956.
 The "House of Worth" brand was revived in 1999.
Isabel Marant is a French house of fashion founded in 1994 by designer Isabel Marant.
 Originally consisting only of a line of jerseys and knitwear, the brand is currently most popular for its shoes, which have been worn by many celebrities, including Kate Bosworth, Katie Holmes, Anne Hathaway and Hilary Duff.
The French House is a Grade II listed pub and dining room at 49 Dean Street, Soho, London.
 It was previously known as the York Minster, but was informally called "the French pub" or "the French house" by its regulars.
 It sells more Ricard than anywhere else in Britain and only serves beer in half-pints, except on April the first, when a recent custom has been that Suggs serves the first pint of the day.
Michael David Kors (born Karl Anderson Jr.; August 9, 1959) is an American sportswear fashion designer.
 He is the honorary chairman and chief creative officer for his company, Michael Kors Holdings Limited (), which sells men's and women's and ready-to-wear, accessories, watches, jewelry, footwear and fragrance.
 Kors was the first women’s ready-to-wear designer for the French house Celine, from 1997 to 2003.
Pansoul is the sole album by French house duo Motorbass, released in July 1996 under the record label Motorbass.
 It was reissued in 2003.
 It is credited as being one of the first and most important albums in the French house genre.

Question: Sofia Richie has been featured in campaigns by the designer who was the first ready-wear designer for which French house?
Answer: Celine