Question: "Chocolate Salty Balls (P.S. I Love You)" is a song from "South Park" performed by a character that is voiced by who?

Context paragraphs:
Chocolate Salty Balls: "Chocolate Salty Balls (P.S. I Love You)" is a 1998 song from the animated comedy TV series "South Park", performed by the character Chef and featured on the soundtrack album "".

South Park, Houston: South Park is a broad post-World War II development in the south-central area of Houston, Texas, a few miles south of MacGregor Park (from which it gets its name) and directly south of the 610 Loop.  According to the 2000 Census, the community has a population of 22,282.  81% of the South Park population is predominately African American, compared to 25% for the city as a whole.  Houston's Martin Luther King Boulevard runs through the area.  Reflecting its postwar origins, many streets in South Park are named after World War II battle sites and persons.  In the 1980s and 1990s crime became a key issue for South Park.  Katharine Shilcutt of the "Houston Press" said "South Park is an overgrown garden these days, its soil only able to be tilled by the most determined or the most desperate.  It shows no sign that it will grow again any time in the near future."

Puffy: P.S. I Love You: Puffy: P.S. I Love You is a 1999 game for PlayStation starring Japanese rock stars Puffy AmiYumi which uses a Light-Gun.  The title is a homage to The Beatles song "P.S. I Love You" from their "Please Please Me" album.

Eric Cartman: Eric Theodore Cartman, often referred to as just Cartman, is a main character in the animated television series "South Park", created by Matt Stone and Trey Parker, and voiced by Trey Parker.  Cartman, generally referred to by his surname, is one of four central characters in "South Park", along with his friends Stan Marsh, Kyle Broflovski, and Kenny McCormick.  Cartman first appeared, originally named Kenny, in prototypical form in a 1992 animated short "Jesus vs. Frosty", and a 1995 animated short "Jesus vs. Santa", and first appeared on television in the pilot episode of "South Park", "Cartman Gets an Anal Probe", on August 13, 1997.

South Park School District: South Park School District is a small, suburban, public school district located in southern in Allegheny County.  It serves the residents of South Park, Pennsylvania, a suburb of Pittsburgh, Pennsylvania.  South Park School District encompasses approximately 9 mi2 square miles.  Per 2001 local census data, it serves a resident population of 14,340.  In 2009 the districts residents' per capita income was $21,538, while the median family income was $57,290.  According to District officials, in school year 2007/08 the South Park School District provided basic educational services to 2,216 pupils through the employment of 153 teachers, 78 full-time and part-time support personnel, and 14 administrators.  South Park School District received more than $9.9 million in state funding in school year 2007/08.

Chef (South Park): Jerome "Chef" McElroy is a cartoon character on the Comedy Central series "South Park" who was voiced by soul singer Isaac Hayes.  A cafeteria worker (as his nickname implies) at the local elementary school in the town of South Park, Colorado, Chef is generally portrayed as more level-headed than the other adult residents of the town, and sympathetic to the kids.  His guidance is often sought by the show's core group of child protagonists – Eric Cartman, Stan Marsh, Kyle Broflovski, and Kenny McCormick – as he is usually the only adult whom they consistently trusted.  To an inadvertent fault, he frequently gives inappropriate advice, usually in the non sequitur form of a lascivious soul song.

Chef's Chocolate Salty Balls: "Chef's Chocolate Salty Balls" is the ninth episode in the second season of the American animated television series "South Park".  The 22nd episode of the series overall, it originally aired on Comedy Central in the United States on August 19, 1998.  The episode was written by series co-creators Trey Parker and Matt Stone, along with Nancy M. Pimental, and directed by Parker.

Wendy Testaburger: Wendy Testaburger is a fictional character in the American animated series "South Park".  The series' most prominent female character, she is best known for her on-again, off-again relationship with her boyfriend, Stan Marsh, and being more intelligent and mature than most children her age, which is utilized by her activism and feminism.  Wendy debuted as a nameless background character in Trey Parker and Matt Stone's 1995 college short film, "The Spirit of Christmas", and made her first appearance on television when "South Park" initially premiered on Comedy Central on August 13, 1997 with the episode "Cartman Gets an Anal Probe".  She is currently voiced by April Stewart.  Prior, she had been voiced by several different voice actors throughout the show's run: Mary Kay Bergman, Eliza Schneider, and Mona Marshall.

South Park Let's Go Tower Defense Play!: South Park Let's Go Tower Defense Play!  is a 2009 video game based on the American animated television series "South Park", released on the Xbox Live Arcade service for the Xbox 360 video game console.  The game was developed by Doublesix in collaboration with South Park Digital Studios and Xbox Live Productions.  "Let's Go Tower Defense Play" is a tower defense game, with the added element of being a fast-paced action game as well.  Thus, players do not only build towers to eliminate destructive forces, but they also have to control multiple characters in order to successfully protect the town of South Park.  "South Park Let's Go Tower Defense Play!"  is the first "South Park" video game released after three early titles released between 1998 and 2000.

South Park, Seattle: South Park is a neighborhood in the city of Seattle, in the U.S. state of Washington.  It is located just south of Georgetown across the Duwamish River, and just north of the city of Tukwila.  Its main thoroughfares are West Marginal Way S. (northwest- and southeast-bound), S. Cloverdale Street (east- and westbound) and 14th Ave. S (north-and-south).  South Park connects to Georgetown by two bridges at 1st Ave S. at the northmost end of the neighborhood, and the South Park Bridge at the north end of 14th Ave. South.  The South Park Bridge was closed on June 30, 2010 and reconstructed due to safety concerns.  The newly constructed bridge reopened to traffic on June 30, 2014.

Supporting paragraphs: Chocolate Salty Balls Chef (South Park)
Answer: Isaac Hayes