"What Is Love" is the title of a song recorded by Eurodance artist Haddaway. It was written and produced by Dee Dee Halligan (Tony Hendrik/Dieter Lünstedt) and Junior Torello (Karin Hartman-Eisenblätter) of Coconut Records in Cologne. Recorded in the early 1990s, it later experienced a revival as the song from the Saturday Night Live "Roxbury Guys" sketches, where two brothers played by Chris Kattan and Will Ferrell frequently went to dance clubs with a third person (including actors such as Sylvester Stallone and Jim Carrey), credited as "Barhop". These sketches were later made into the 1998 feature film A Night at the Roxbury but the "Barhop" role was dropped during the production of the film. The song itself and "A Night at the Roxbury" would later become a meme on YTMND.
The song peaked at number two in the United Kingdom and Germany, but it reached number one in 13 other countries, all of them European or Asian. The song reached number 11 on the Billboard Hot 100 in the United States, and number 12 in Australia. The song is currently the 75th best-selling single of all time in Germany.
The song was used in a 2011 TV advertising campaign for British clothing retailer Next, pushing it into the UK iTunes Store chart top 100.