In show business (music, TV shows, etc.), a guest appearance is a participation of an outsider performer (musician, actor, etc.), usually called guest artist (guest dancer, guest violinist, etc.), in an event (music record, concert, show, etc.), i.e., the participation of a performer which does not belong to the regular crew (cast, band, contract personnel, etc.) In performance art, the terms guest role or guest star are also common, the latter term specifically indicating the guest appearance of a celebrity. The latter is often also credited as "Special guest star" or "Special Musical Guest Star" by some production companies.

In pop music guest appearances are often described with the words featuring, with, or and. It is abbreviated in credit lists as Feat., Ft., f.

In television series, a guest star is an actor who appears in one or a few episodes. In radio and television shows, a guest star is a guest of the show who is a celebrity.

Guest appearances have been known in theatre, ballet, and classical music for centuries, with guests both from the home country and from abroad. The advent of air transport has made this practice much more practical and global.

In computing, a newline, also known as a line break or end-of-line (EOL) marker, is a special character or sequence of characters signifying the end of a line of text. The name comes from the fact that the next character after the newline will appear on a new line—that is, on the next line below the text immediately preceding the newline. The actual codes representing a newline vary across operating systems, which can be a problem when exchanging text files between systems with different newline representations.

There is also some confusion whether newlines terminate or separate lines. If a newline is considered a separator, there will be no newline after the last line of a file. The general convention on most systems is to add a newline even after the last line, i.e. to treat newline as a line terminator. Some programs have problems processing the last line of a file if it is not newline terminated. Conversely, programs that expect newline to be used as a separator will interpret a final newline as starting a new (empty) line.

Sir James Paul McCartney, MBE, Hon RAM, FRCM (born 18 June 1942) is an English musician, singer-songwriter and composer. Formerly of the Beatles (1960–1970) and Wings (1971–1981), he has been described by Guinness World Records as "The Most Successful Composer and Recording Artist of All Time", with 60 gold discs and sales of over 100 million albums and 100 million singles. With John Lennon, George Harrison, and Ringo Starr, he gained worldwide fame as a member of the Beatles, and with Lennon formed one of the most celebrated songwriting partnerships of the 20th century. After leaving the Beatles, he began a solo career and later formed the band Wings with his first wife, Linda Eastman, and singer-songwriter Denny Laine.

According to the BBC, his Beatles song "Yesterday" has been covered by over 2,200 artists—more than any other song. Wings' 1977 release, "Mull of Kintyre", became one of the best-selling singles ever in the UK, and he is "the most successful songwriter" in UK chart history, according to Guinness. As a songwriter or co-writer, he is included on thirty-one number one titles on the Billboard Hot 100, and as of 2012 he has sold over 15.5 million RIAA certified units in the United States.

Natalie Hershlag (Hebrew: נטלי הרשלג‎; born June 9, 1981), better known by her stage name Natalie Portman, is an actress with dual American and Israeli citizenship. Her first role was as an orphan taken in by a hitman in the 1994 French action film Léon, but mainstream success came when she was cast as Padmé Amidala in the Star Wars prequel trilogy (released in 1999, 2002 and 2005). In 1999, she enrolled at Harvard University to study psychology while still working as an actress. She completed her bachelor's degree in 2003.

In 2001, Portman opened in New York City's Public Theater production of Anton Chekhov's The Seagull. In 2005, Portman received a nomination for the Academy Award for Best Supporting Actress as well as winning the Golden Globe Award for Best Supporting Actress - Motion Picture for the drama Closer. She won a Constellation Award for Best Female Performance, and a Saturn Award for Best Actress for her starring role in V for Vendetta (2006). She played leading roles in the historical dramas Goya's Ghosts (2006) and The Other Boleyn Girl (2008). In May 2008, she served as the youngest member of the 61st Annual Cannes Film Festival jury. Portman's directorial debut, Eve, opened the 65th Venice International Film Festival's shorts competition in 2008. Portman directed a segment of the collective film New York, I Love You.

John Christopher "Johnny" Depp II (born June 9, 1963) is an American actor, producer and musician. He has won the Golden Globe Award and Screen Actors Guild award for Best Actor. Depp rose to prominence on the 1980s television series 21 Jump Street, becoming a teen idol. Dissatisfied with that status, Depp turned to film for more challenging roles; he played the title character of Edward Scissorhands (1990) and later found box office success in films such as Sleepy Hollow (1999), Charlie and the Chocolate Factory (2005), Rango (2011) and the Pirates of the Caribbean film series (2003–present). He has collaborated with director and friend Tim Burton in eight films, most recently with Dark Shadows (2012).

Depp has gained acclaim for his portrayals of people such as Ed Wood, in Ed Wood, Joseph D. Pistone in Donnie Brasco, Hunter S. Thompson in Fear and Loathing in Las Vegas, George Jung in Blow, and the bank robber John Dillinger in Michael Mann's Public Enemies. Films featuring Depp have grossed over $3.1 billion at the United States box office and over $7.6 billion worldwide. He has been nominated for top awards many times, winning the Best Actor Awards from the Golden Globes for Sweeney Todd: The Demon Barber of Fleet Street and from the Screen Actors Guild for Pirates of the Caribbean: The Curse of the Black Pearl. He also has garnered a sex symbol status in American cinema, being twice named as the "Sexiest Man Alive" by People magazine in 2003 and 2009. He has been listed in the 2012 Guinness Book of World Records as the highest paid actor, with $75 million.