Question: Matthew Felker acts alongside a dancer who began her career with what singer?

Context paragraphs:
Jenna Dewan: Jenna Dewan Tatum (born Jenna Lee Dewan; December 3, 1980) is an American actress and dancer.  She began her career as a backup dancer for Janet Jackson, and later worked with artists including Pink, Missy Elliott, and Christina Aguilera.  She is known for her role as Nora Clark in the 2006 film "Step Up".  She has also starred on the short-lived NBC series "The Playboy Club" and had a recurring role on the FX series "American Horror Story".  She was Freya Beauchamp on the Lifetime series "Witches of East End" and as of 2016 was playing the recurring role of Lucy Lane in "Supergirl".

Les Mangelepa: Les Mangelepa is a musical group from Kenya.  It is considered as one of the golden era of Kenyan Lingala music acts alongside Super Mazembe, Baba Gaston and Samba Mapangala.

Matthew Felker: Matthew Felker is an American writer, producer, actor, and model.  He is currently starring and an executive producer on the Penelope Spheeris directed comedy titled "Balls to the Wall" opposite Mimi Rogers, Christopher McDonald, Joe Hursley, Colleen Camp and Jenna Dewan.  He works often with directors Penelope Spheeris and Joseph Kahn.

Jessica Haines: Jessica Haines (born 1978) is a South African actress.  She is best known for the 2008 film "Disgrace" in which she acts alongside John Malkovich.  She frequently works in Johannesburg.  She is married to Richard Ancrum Walker, they have three children.  After living in North Africa, Tunisia, for two years they are now based in Kenya, where their three children were born

Mercy Edirisinghe: Mercy Edirisinghe (1945/1946 – 17 March 2014) was a popular Sri Lankan stage actress and singer.  She began her singing career in 1964 from the 'Nawaka Madala' song contest and became a stage actress in 1966.  Her most famous play was a musical by Lushan Bulathsinhala, titled Tharavo Igilethi (Ducks fly).  Composed by Gunadasa Kapuge, 'Made Lagina Tharawan' from the soundtrack of the play became her most successful single.  She is also well known for her role in numerous comedic television shows and radio dramas, the most famous of which is a radio program titled 'Vinoda Samaya', in which she acts alongside Annesly Dias, Berty Gunattileke and Samuel Rodrigo.

Sayoko Ohashi: Sayoko Ohashi (大橋沙代子, , おおはしさよこ , Ohashi Sayoko) born May 20, 1985 is a Japanese actress and gravure model.  She is one of the models featured in the video game "", and acts alongside fellow professional model Krystal Forscutt.  She also performed a minor voice role in the Japanese-language version of the video game "".  Her favourite sport is volleyball.

Lydia Díaz Cruz: Lydia Diaz Cruz is a Prima Ballerina who started dancing in Havana, Cuba, and trained with Fernando Alonso and Alicia Alonso.  As a young dancer, she was talent-spotted by a well-known British dancer and teacher from an earlier era, Dame Phyllis Bedells, who traveled to Cuba and regarded her as the most naturally gifted dancer she'd seen since Margot Fonteyn.  Early marriage and exile from Cuba in the wake of the Castro revolution put a halt to her career, which she resumed after the birth of her third child in the early sixties.  She went on to dance in the United States with Ballet Concerto in Miami, became principal dancer with the National Ballet of Washington, D.C., and has performed in principal guest roles with the National Ballet of Venezuela, Washington Ballet, Ballet Spectacular.  She danced alongside many of the great artists of the day, including Margot Fonteyn and Melissa Hayden, among many others.

Rudy Jahchan: Rudy Jahchan is the co-producer and star of popular internet shows Galacticast, A Comicbook Orange, and Kitkast.  The primary writer and director of the shows, he also manages the technical aspects such as devising the special effects and developing their websites, and acts alongside his partner and co-star Casey McKinnon.

Solicitor General for New South Wales: Solicitor General for New South Wales, known informally as the Solicitor General, is one of the Law Officers of the Crown, and the deputy of the Attorney General.  He or she can exercise the powers of the Attorney General in the Attorney General's absence.  The Solicitor General acts alongside the Crown Advocate, and Crown Solicitor, and serves as one the legal and constitutional advisers of the Crown and its government in the Australian state of New South Wales.

JC Chasez: Joshua Scott "JC" Chasez ( ; born August 8, 1976) is an American singer, songwriter, dancer, record producer, and occasional actor.  He started out his career as a cast member on "The Mickey Mouse Club" before rising to stardom with *NSYNC, and by writing and producing for music acts such as Girls Aloud, Basement Jaxx, David Archuleta, and Matthew Morrison.  He also served as a judge for "America's Best Dance Crew".

Supporting paragraphs: Matthew Felker Jenna Dewan
Answer: Janet Jackson