Addie Singer is a fictional character from the television series All That, which aired on Nickelodeon. She is portrayed as a talented and creative teenager who often showcases her skills in various comedic sketches. Addie's character is known for her upbeat personality and her ability to connect with the audience. In the show, Addie often participates in skits that highlight her interests and experiences as a young girl. The series features a diverse cast and includes various segments that address themes relevant to children and pre-teens, making it a popular choice for its target audience during the late 1990s and early 2000s.