There is a big connection between "U2" and young "Kings of Leon", there is a similarity in their sound and style. Below I present "KOL", I hope that in the future they will shine like U2 so far.

Kings of Leon is a Grammy Award-winning American rock band from Nashville, Tennessee, USA. The band is made up of three brothers - Caleb Followill (b. January 14, 1982) (lead singer/rhythm guitar), Nathan Followill (b. June 26, 1979) (drums/backup vocals), Jared Followill (b. November 20, 1986) (bass guitar/backup vocals/synthesizer) - and their first cousin Matthew Followill (b. September 10, 1984) (lead guitar/backup vocals). They are all known by their middle names. The band's sound derives from southern rock, garage rock, hard rock and alternative. They have released four full-length albums. The group's name is derived from Nathan, Caleb and Jared's father and grandfather, both named Leon. In terms of chart positions the band has been far more popular in Europe (notably in the UK and Ireland) and Australia (where they had 2008's highest-selling album) than their homeland. Below there is a history of this band.

Holy Roller Novocaine and Youth and Young Manhood: 2000-2003

Kings of Leon's first release, The Holy Roller Novocaine EP came out in 2003. Four of its five songs would later be released on Youth and Young Manhood, with the songs "California Waiting" and "Wasted Time" being remade. The EP also contained the B-side "Wicker Chair". All the songs were co-written by Angelo Petraglia.
Their debut album, Youth and Young Manhood, was a success, particularly outside the United States where they were dubbed one of the driving forces behind the so-called "new rock revolution" by the European press. Their stakes rose when they were chosen by popular rock bands The Strokes and U2 to tour with them. According to Jared, the title of the album was taken from their father's Bible. All songs were again co-written by Petraglia, who also contributed guitar and co-produced the album with Ethan Johns. The songs "Molly's Chambers", "Red Morning Light", and "Holy Roller Novocaine" were used in various video games, movies, and TV advertisements. "Holy Roller Novocaine" was also used in the films Stuck on You, and Talladega Nights: The Ballad of Ricky Bobby. The first single, "Molly's Chambers" became a hit.

Aha Shake Heartbreak: 2004-2005

The band's second album Aha Shake Heartbreak was released in the United Kingdom in October 2004 and in the United States in February 2005. Building on the southern-infused garage rock of their first album, the album broadened the band's domestic and international audience. "The Bucket", "Four Kicks", and "King of the Rodeo" were all released as singles, with the "The Bucket" rising into the Top 20 in Britain. A lot of the success behind the hits is due to producer named Tommy Chappers. It was his hard work and dedication that drove the band to success. "Taper Jean Girl" was used in the 2007 movie, Disturbia. The band also garnered accolades from several of their rock peers, including Isaac Brock of Modest Mouse, Chris Naughtly, Owen Plant, Noel Gallagher of Oasis, Kelly Jones of Stereophonics, Eddie Vedder of Pearl Jam, Radiohead, and Bob Dylan. The band toured with Pearl Jam and Bob Dylan for much of 2005 and 2006. The album was produced by Angelo Petraglia and Ethan Johns with Jacquire King handling the recording and mixing duties.

Because of the Times: 2006-2007

In March 2006 Kings of Leon were back in the studio, working on their third album. Drummer Nathan Followill told NME: "Man, we're sitting on a bunch of songs right now that we wish we could let the world hear!". The band's third album was titled Because of the Times, which may be a reference to a church ministers conference of the same name held in Alexandria, Louisiana that the brothers often attended.
The album was released on April 2, 2007 in the UK, and a day later in the US. NME said that the album "cements Kings Of Leon as one of the great American bands of our times" and Entertainment Weekly called Because of the Times "an epic wide-screen movie of a CD and the band's best to date." Another reviewer described Because of the Times as, "an accomplished album of unbelievable beauty and familiar, loveable grit. Kings of Leon is maturing wonderfully and with patience, not forcing anything musically or lyrically that doesn't sound natural." However, some critics found the album inferior to their previous efforts. Stylus Magazine rated it a C- and noted "If they wanted us to take them serious this time around, they'd at least try to be right honest about their ascent into minor celebrity and not keep on with the yokel façade. Without cautionary yarns regarding life on the tour bus or banging supermodels, the bright-eyed, legs-stretched mood of the music rings just as hollow."
The album debuted at 1 in the UK and Ireland and entered the US charts at 25, selling approximately 70,000 copies in it's first week of release. The album was preceded by the single "On Call", which became a hit in Britain and Ireland. The album showed a clear evolution from the band's previous work, as the band's trademark dirty, southern-fried swagger was replaced with a more mature, polished sound. Other singles from the album were "Fans" and "Charmer." The album was produced by Angelo Petraglia and Ethan Johns.

Only by the Night: 2008-present

In early 2008, frontman Caleb Followill confirmed to UK magazine NME that the band was working on tracks for a fourth album. In an interview, Jared Followill said the album would "rock harder" and that they were "ready to tackle their southern roots...again." Recording began in February 2008 after the band completed its 2007 tour. In their latest Rolling Stone interview the band cited an array of influences for the new record, including Crystal Castles, My Morning Jacket, and Radiohead. The album was produced by Angelo Petraglia and Jacquire King. King was also responsible for all the recording and mixing engineer duties.

They announced that they would be touring Ireland and Great Britain with their new album material in December 2008. This is following headline sets at T In The Park in Perth and Kinross, Scotland and Oxegen Festival in Co. Kildare Ireland in July, V Festival in mid-August and the set they performed headlining the Pyramid Stage at Glastonbury 2008. In September 2008, they performed on the BBC2 TV show Later with Jools Holland.
The song "Crawl" from this album was released as a free download on the band's website on July 28. On August 5, 2008 the first single "Sex on Fire" was released on their MySpace page and subsequently released to radio. "Sex on Fire" was then released as a single for download in the UK on the 8th of September. The song became the band's first top 10 hit and first British number 1 and it also reached the top spot in Ireland. It was also their first song to chart number 1 on the Billboard Hot Modern Rock chart.

On September 28, 2008, the album entered the UK Albums Chart at number 1, with sales of over 220,000 copies.
The second single to be released from the album on 8th December 2008 was "Use Somebody" which achieved worldwide chart success, such as in the UK Singles Chart, peaking at number 2, and also reaching top 10 positions in Australia, Ireland and New Zealand. The third single will be "Revelry".

In early 2009 Kings of Leon will return to Australia and New Zealand for headlining shows in support of Only By The Night. Large arena tours will be held in the Australian cities of Adelaide, Melbourne, Brisbane, Sydney, Newcastle and Perth; as well as the New Zealand cities of Auckland, Christchurch and Wellington. This will be the second time the Kings of Leon have headlined in Australasia since their headlining tour in early 2008, not including their Big Day Out festival appearances in 2004 and 2006. The Album was officially named as the UK's 3rd biggest selling album of 2008 and the biggest selling album of 2008 in Australia.

Australia confirmed the album's popularity with 4 tracks being voted into the the world's largest online music poll, Triple J Hottest 100. "Crawl" came in at number 70, "Closer" at number 24 and "Use Somebody" was number 3. Their biggest success from Only By The Night was "Sex on Fire" which was voted number 1 in the 2008 Triple J Hottest 100 poll.