Celebrities in the Grand Theft Auto Series are featured in every GTA game released and usually featured in side missions or actual missions themselves, usually as a boss or mentor of sorts. Here is a list of celebrities in each game.
Grand Theft Auto: Vice City
Alpha Banditos is a band whose instrumental song "The Bull Is Wrong" is heard on the radio station Radio Espantoso.
Candy Suxxx was a beloved adult-film acress back in the 70's and 80's and was one of the porn industry's most successful entrepreneurs. She is now a teacher. Love Fist was a popular rock band back in the mid to late 1980's, they were notorious for living on the edge and sexual exploits.
Tres Apenas Como Eso is a Latin band. They have only one song "Yo Te Mire" and it can be heard on Radio Espantoso and inside Ocean View Hotel.
Unaesta is another Latin band. Their song "La Vida es Una Lenteja" appears on Radio Espantoso and sometimes can be heard inside Ocean View Hotel. It is also included in the game's official soundtrack.
Grand Theft Auto: San Andreas
The Gurning Chimps is a musical group from England. Maccer is the only member of the group seen in the game. The manager (as of 1992) is Kent Paul, and the band is known to be active until at least 1998.
Grand Theft Auto: Liberty City Stories
Rudy LaFontaine is a singer whose song "Funk in Time" is heard on the radio station Lips 106.
Sunshine Shine is a boy band whose song "Mine Until Monday" is heard on the radio station Lips 106.
Grand Theft Auto: Vice City Stories
Phil Collins was the first real celebrity featured in GTA series. He is a pop music singer. He is featured in these mssions: Kill Phil, Kill Phil: Part 2 and In The Air Tonight. All three missions are set in set in 1984.
After the player completes "In The Air Tonight", he can watch Phil's concert in Hyman Memorial Stadium by paying $6000.
Grand Theft Auto IV
Cloe Parker is a world-famous 24-year-old (as of 2008) celebutante best known for her extravagant spending and a lifestyle of excess. Her father is the mysterious Mr. Parker who treats his daughter's every desire.
Jill Von Crastenburg is the 13-year-old (as of 2008) heiress to her family's enormous investment banking fortune and a leading figure on the Liberty City party circuit. She is thought to have been featured in an infamous sex tape and is considered by most to have multiple STD's.
Joe Lawton is the President of the United States in 2008. His father was a former President.
Real-life celebrities Katt Williams and Ricky Gervais appear in the game as performers at the Split Sides comedy club. They are also interviewed on Fizz!, the celebrity program on the radio station WKTT.