Katherine von Drachenberg, best known under her registered trademark Kat Von D (born March 8, 1982), is an American tattoo artist, model and television personality. She is best known for her work as a tattoo artist on the TLC reality television show LA Ink, which premiered August 7, 2007, in the United States and ran four seasons.

Kat Von D was born in Montemorelos, Nuevo León, Mexico. Her missionary parents, father René and mother Sylvia or Silvia Galeano, were born in Argentina, of German descent and Italian and Spanish descent, respectively. Von D has a sister, Karoline and a brother, Michael. She moved with her family to the Los Angeles area at age 4 and grew up in Colton, California. Von D was classically trained in piano beginning at age 6. She particularly appreciates Ludwig van Beethoven.

Von D credits her grandmother, Clara von Drachenberg, as an inspiration for her in music and art, and the Latino culture of Los Angeles as a major influence on her tattoo art and style. She began listening to the Ramones, Misfits and other punk rock bands at the age of 12. She got her first tattoo at 14 and quit school at 16 to become a tattoo artist.

David Michael Letterman (born April 12, 1947) is an American television host and comedian. He hosts the late night television talk show, Late Show with David Letterman, broadcast on CBS. Letterman has been a fixture on late night television since the 1982 debut of Late Night with David Letterman on NBC. Letterman recently surpassed friend and mentor Johnny Carson for having the longest late-night hosting career in the United States of America.

Letterman is also a television and film producer. His company Worldwide Pants produces his show as well as its network follow-up The Late Late Show with Craig Ferguson. Worldwide Pants has also produced several prime-time comedies, the most successful of which was Everybody Loves Raymond, currently in syndication.

In 1996, David Letterman was ranked #45 on TV Guide's 50 Greatest TV Stars of All Time.

Letterman was born in Indianapolis, Indiana. His father, Harry Joseph Letterman (April 1915 – February 1973), was a florist of British descent; his mother Dorothy Letterman (née Hofert, now Dorothy Mengering), a Presbyterian church secretary of German descent, is an occasional figure on the show, usually at holidays and birthdays.

Michael Thomas "Tom" Green (born July 30, 1971) is a Canadian actor, rapper, writer, comedian, talk show host and media personality. Best known for his shock humour brand of comedy, Green found mainstream prominence via his MTV television show The Tom Green Show. Green was also in the public eye for his short-lived marriage to actress Drew Barrymore, and for his roles in such films as Freddy Got Fingered, Road Trip, Stealing Harvard and Charlie's Angels.

In June 2003, Green had the chance to guest-host the Late Show with David Letterman which led to him hosting his own late-night talk show on MTV entitled The New Tom Green Show. From 2006-2011, he hosted his internet talk show Tom Green's House Tonight from his living room and, as of January 2010, has started performing stand-up comedy.

Green was born in Pembroke, Ontario, the son of Mary Jane, a communications consultant, and Richard Green, a computer systems analyst and retired army captain. He grew up on a Canadian Army base near Pembroke, Ontario and later lived in Gloucester, Ontario (now part of the City of Ottawa) where he attended Colonel By Secondary School. Green studied television broadcasting at Algonquin College and graduated in 1994.