Shinee (/ˈʃaɪniː/ SHY-nee; Korean: 샤이니, romanized: Syaini; Japanese: シャイニー, romanized: Shainī; stylized as SHINee) is a South Korean boy band formed by SM Entertainment in 2008. The group consists of four members: Onew, Key, Minho, and Taemin. Originally a five-piece band, Jonghyun died on December 18, 2017. The group's musical impact in their native country has earned them numerous accolades and the title "Princes of K-pop", and their music has been listed among the greatest boy band songs of all time.

Shinee debuted in May 2008 with their first extended play (EP), Replay, fronted by the single of the same name. The group gained attention for starting a fashion trend amongst students, which the media dubbed the "Shinee Trend". In August 2008, the group released their first Korean studio album, The Shinee World, which won Newcomer Album of the Year at the 23rd Golden Disc Awards. Shinee further consolidated their popularity on the South Korean music scene with follow-up singles "Ring Ding Dong" and "Lucifer". "Ring Ding Dong" charted on top of several Korean music charts and gained popularity all over Asia. "Lucifer" was nominated for the Best Dance Performance Award at the Mnet Asian Music Awards in 2010 for its outstanding choreography. In 2012, the group released Sherlock, which became the fifth best-selling album of the year with over 180,000 copies sold. Subsequent albums included The Misconceptions of Us (2013), Odd (2015), 1 of 1 (2016), The Story of Light (2018), Don't Call Me (2021), and Hard (2023). The group has also been included in the Forbes Korea Power Celebrity 40 twice (2014, 2016).

In mid-2011, Shinee signed with EMI Music Japan to venture into the Japanese music scene. Their Japanese version of their single "Replay" sold over 100,000 copies, the highest number of sales for a Japanese debut single recorded by Oricon for a South Korean group at the time. It was followed by their first Japanese studio album, The First, on December 7, 2011 – both were certified Gold by RIAJ for selling over 100,000 copies. In 2011, the group also held their Japan Debut Premium Reception at Abbey Road Studios in London, making them the first Asian artists to perform there. Two years later, they released their second Japanese album Boys Meet U (2013), followed by I'm Your Boy (2014), D×D×D (2016), and Five (2017).

Shinee is considered to be one of the best live vocal groups in K-pop and is known for their highly synchronized and complex dance routines, having been awarded the Best Dance Performance Award at the Mnet Asian Music Awards three times in a row for their dance performances to "Sherlock (Clue + Note)", "Dream Girl" and "View". Shinee's signature musical style is contemporary R&B, but the group is known for their experimental sound, incorporating various genres including funk rock, hip hop, and EDM.

Prior to the group's debut, the label company, SM Entertainment, introduced an upcoming contemporary R&B boy group with its goal to be trendsetters in all areas of music, fashion and dance. The group's Korean name, Shinee, is a new coined word and is explained as a combination of shine, meaning light, and the suffix ee, therefore meaning "one who receives the light". On May 22, 2008, the group's first EP, Replay, was released, which debuted at number ten on the South Korean music charts and peaked at number eight, selling 17,957 copies in the first half of 2008. On May 25, 2008, Shinee had their first stage performance on SBS' Inkigayo with their single "Replay".

In June 2008, the group won their first award, Rookie of the Month, at the Cyworld Digital Music Awards, and were also awarded with the Hot New Star award at the Mnet 20's Choice Awards in August 2008. In the same month, Shinee subsequently released their first full-length album, The Shinee World, which debuted at number three, selling 30,000 copies. Its lead single "Love Like Oxygen" is a cover of "Show the World" by Martin Hoberg Hedegaard, originally written by the Danish songwriting and production team of Thomas Troelsen, Remee, and Lucas Secon. On September 18, 2008, the song won first place on M Countdown, making it the group's first win on a South Korean music show since debut.

Shinee participated in the 5th Asia Song Festival, where they received the Best New Artist award along with Japanese girl group Berryz Kobo. The group attended the Style Icon Awards on October 30, 2008, where they received the Best Style Icon Award. On the same day, a repackaged version of The Shinee World, titled Amigo, was released, which includes three new songs: "Forever or Never", a remix of "Love Should Go On", and the title track "Amigo". "Amigo" is a shortened version of the Korean phrase "areumdaun minyeoreul joahamyeon gosaenghanda", which can be translated to "The heart aches when you fall in love with a beauty".

In November 2008, Shinee won the Best New Male Group award at the 2008 Mnet KM Music Festival, beating fellow newcomers U-KISS, 2PM, 2AM and Mighty Mouth. In addition, the group also won the award for Newcomer Album of the Year at the 23rd Golden Disc Awards.