Question: Which American singer appeared in music videos for R&B group B2K and also featured on the mixtape Detroit by American rapper Big Sean? 
Facts:
Detroit (mixtape) includes Jhené Aiko
Detroit (mixtape) is the fourth mixtape by American rapper Big Sean
Jhené Aiko appeared in several music videos for R&amp;B group B2K.
Jhené Aiko is an American singer
Answer: Jhené Aiko