Question: Brittany Smith, better known by her stage name Matisse, is an American actress, model, singer, and songwriter, on October 7, 2011 labels such as J Records and Arista were sold to Sony's Flagship Label and all artists such as Avril Lavigne, were merged to sign to which organization?
Sentence (from "Matisse (singer)"): She was best known for being part of the duo Brit & Alex (with twin sister Alex), until their breakup in 2009.
Relevant evidence: No