Jessica Ann Johnson (née Simpson; born July 10, 1980) is an American singer, actress and model. She first rose to prominence in 1999, and has released albums such as Sweet Kisses and Do You Know.

She performed a cover version of "Part of Your World" from The Little Mermaid, and performed a cover version of "A Whole New World" for the Aladdin Platinum Edition, alongside Nick Lachey. She is also the older sister of Ashlee Simpson. She and Ashlee had also made an appearance on a Disney Christmas show and concert special.