Karlstad [ˈkɑːɭsta] is a city, the seat of Karlstad Municipality, the capital of Värmland County, and the largest city in the province Värmland in Sweden. The city had 61,685 inhabitants in 2010 out of a municipal total that during the first quarter 2010 was 84,885 inhabitants. Karlstad has a university and a cathedral.

Karlstad is built on the river delta where Sweden's longest river, Klarälven, runs into Sweden's largest lake, Vänern. It has the second largest lake port in the country after Västerås.

Karlstad is often associated with sunshine and the symbol for Karlstad is a happy sun. Karlstad is reputed to be one of the sunniest towns in Sweden and a local waitress, known as "Sola i Karlstad" (the Sun in Karlstad) for her sunny disposition, is also commemorated with a statue.

On Karlstad's largest islet, there was a place of counsel called Tingvalla in the medieval age, which had roots from the Viking Age before 1000 AD. It was also used as a market place.

Karlstad was granted its city charter on March 5, 1584 by the Swedish Duke Charles, who would later be crowned King Charles IX of Sweden. The city derives its name from the King – Karlstad literally means Charles' city. The Duke also granted Karlstad the right as a governmental seat in the region, and gave it a substantial amount of land.

Pierre David Guetta (7 November 1967), known professionally as David Guetta (French pronunciation: [daˌvid ɡɛˈta]), is a French house music producer and DJ. Originally a DJ at nightclubs during the 1980s and 1990s, he co-founded Gum Productions and released his first album, Just a Little More Love, in 2002. Later, he released Guetta Blaster (2004) and Pop Life (2007). His 2009 album One Love included the hit singles "When Love Takes Over" (featuring Kelly Rowland), "Gettin' Over You" (featuring Chris Willis, Fergie & LMFAO) and "Sexy Bitch" (featuring Akon), the last becoming a top five hit in the United States and all three reaching #1 in the United Kingdom, as well as another internationally known single called "Memories" featuring Kid Cudi which became a top five hit in many countries. Guetta has sold over three million albums and 15 million singles worldwide. He is currently one of the most sought-after music producers. As at 2012 David Guetta is the world's most popular DJ, claiming the #1 poll position of the DJ Mag 100 popularity poll.