Jessi (제시), also known as Jessica H.O, is an American female artist specializing in the rap genre. She is based in South Korea and has participated in popular Korean TV shows, such as, Unpretty Rapstar and High School Rapper.

She released her first album Get Up in 2005, performing the main song on the television program Music Bank. Her second project titled The Rebirth was released in January 2009—after this release, she took a break from the music and left Korea to return to America.

In 2014, after a 5-year hiatus, Jessi returned as a member of the hip-hop trio Lucky J with rapper J'Kyun and vocalist JERO—also known as J-Yo. The group debuted with the digital single “Can You Hear Me” under YMC Entertainment in July of that year, soon to be disbanded as a team due to J-Yo wanting to make a solo debut himself.

In 2019, she was signed under P-NATION Entertainment.

in October 2020, she debuted in the project group, Refund Sisters, with their first single “Don’t Touch Me.”

On July 2022, P NATION announced Jessi’s departure from the agency after her 3-year contract expired and she decided not to renew it. She later announced that she signed to close collaborator Jay Park’s label, MORE VISION.