The answer is Adrienne Bailon, there is no maiden name for Adrienne Bailon-Houghton since Houghton is not her maiden name. It is the last name of her husband, Israel Houghton, whom she married in 2016. Prior to her marriage, she was known professionally as Adrienne Bailon.
Unveiling Adrienne Bailon-Houghton: A Terrific Test on the Multitalented Queen!