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The Jam were an English mod revival/punk rock band during the 1970s and early 1980s, which formed in 1972 at Sheerwater Secondary School in Woking, in the county of Surrey.

The Janoskians (Just another name of silly kids in another nation) are a YouTube comedy group from Melbourne, Australia, The group consists of elder brother Beau Brooks, twins Luke and Jai Brooks, and friend Daniel Sahyoune. James Yammouni left in 2016.

The Jets are a Polynesian-American family band from Minneapolis, Minnesota, composed of brothers and sisters LeRoy, Eddie, Eugene, Haini, Rudy, Kathi, Elizabeth, and Moana Wolfgramm, who perform pop, R&B, and dance music. They started performing as a family band in 1977. The Jets were discovered by Don Powell, who previously managed Stevie Wonder and David Bowie, among other artists.

The Jim Jones Revue were an English garage rock and roll band composed of Jim Jones, Rupert Orton, Henri Herbert, Gavin Jay and Nick Jones.

The Joy Formidable is a Welsh alternative rock band, formed in 2007 in Mold, Flintshire, and is based in London, England. The band consists of Rhiannon "Ritzy" Bryan (lead vocals, guitar), Rhydian Dafydd (bass, vocals) and Matthew James Thomas (drums, percussion).

Kid Laroi, born Charlton Howard in 2003, is an Australian rapper and singer. He rose to fame through his connection with Juice Wrld and gained global recognition with the hit "Stay" in 2021, featuring Justin Bieber.

The Killers are an American rock band formed in Las Vegas in 2001 by Brandon Flowers (lead vocals, keyboards, bass) and Dave Keuning (lead guitar, backing vocals). The official lineup of the band was completed when Mark Stoermer (bass, rhythm guitar, backing vocals) and Ronnie Vannucci Jr. (drums, percussion) joined in 2002.

The Kills are an English-American rock duo formed by American singer Alison "VV" Mosshart and English guitarist Jamie "Hotel" Hince.

The Knife were a Swedish electronic music duo from Gothenburg, formed in 1999. The group consisted of siblings Karin and Olof Dreijer, who together also run their own record company, Rabid Records. The group gained a large international following in response to their 2003 album Deep Cuts.

The Kooks are an English indie rock band formed in 2004 in Brighton. The band consists of Luke Pritchard (vocals/rhythm guitar), Hugh Harris (lead guitar/synthesizer/bass) and Alexis Nunez (drums). The original bassist was Max Rafferty, and the founding drummer was Paul Garred.

The La's were an English rock band from Liverpool, originally active from 1983 until 1992.

The Lacs is an American country rap duo that consists of Clay "Uncle Snap" Sharpe and Brian "Rooster" King.