"Mack the Knife" or "The Ballad of Mack the Knife", originally "Die Moritat von Mackie Messer", is a song composed by Kurt Weill with lyrics by Bertolt Brecht for their music drama Die Dreigroschenoper, or, as it is known in English, The Threepenny Opera. It premiered in Berlin in 1928 at the Theater am Schiffbauerdamm. The song has become a popular standard.

A moritat (from mori meaning "deadly" and tat meaning "deed") is a medieval version of the murder ballad performed by strolling minstrels. In The Threepenny Opera, the moritat singer with his street organ introduces and closes the drama with the tale of the deadly Mackie Messer, or Mack the Knife, a character based on the dashing highwayman Macheath in John Gay's The Beggar's Opera (who was in turn based on the historical thief Jack Sheppard). The Brecht-Weill version of the character was far more cruel and sinister, and has been transformed into a modern anti-hero.

The play opens with the moritat singer comparing Macheath (unfavorably) with a shark, and then telling tales of his robberies, murders, rapes, and arson.

The Knife are a Swedish electronic music duo from Gothenburg, formed in 1999. The group consists of siblings Karin Dreijer Andersson and Olof Dreijer, who together also run their own record company, Rabid Records. They first received international attention after their song "Heartbeats", covered by José González, appeared in a commercial by Sony. Subsequent songs have appeared on a number of television shows. Their first tour took place in 2006, as well as the release of their critically acclaimed album Silent Shout. They have won a number of Swedish Grammis, but refuse to attend awards ceremonies. They have appeared in public wearing Venetian masks. Andersson released a solo album under the name Fever Ray in 2009, while her brother released several EPs as Oni Ayhun in late 2009 and early 2010.

Formed in 1999, the group first gained international recognition when José González covered their song "Heartbeats" on his 2003 album, Veneer. The cover was used by Sony in a commercial for BRAVIA television sets, and released as a single in 2006. The group commented on this in a Dagens Nyheter article, claiming that Sony paid a large sum of money to use the song. Despite the group's anti-commercial views, they justified the transaction by citing their need for money to establish a record company.

Bobby Darin (born Walden Robert Cassotto; May 14, 1936 – December 20, 1973) was an American singer who performed in a range of music genres, including pop, rock, jazz, folk, and country.

He started as a songwriter for Connie Francis, and recorded his own first million-seller "Splish Splash" in 1958. This was followed by "Dream Lover", "Mack the Knife" and "Beyond the Sea", which brought him world fame. In 1962, he won a Golden Globe for his first film Come September, co-starring his wife Sandra Dee.

Through the 1960s he became more political, and worked on Bobby Kennedy's presidential campaign, being present on the night of his assassination. This affected him and sent him into a period of seclusion.

Although he made a successful television comeback, his health was starting to fail, as he had always expected, following bouts of rheumatic fever in childhood. This knowledge had always spurred him on to exploit his musical talent while still young. He died at 37, following a heart operation in Los Angeles.