In October 2006, Coldplay began work on their fourth studio album, Viva la Vida or Death and All His Friends, with producer Brian Eno. Taking a break from recording, the band toured Latin America in early 2007, finishing the Twisted Logic Tour by performing in Chile, Argentina, Brazil, and Mexico. After recording in churches and other venues in Latin America and Spain during their tour, the band said the album would likely reflect Hispanic influence. The group spent the rest of the year recording most of the album with Eno.Martin described Viva la Vida as a new direction for Coldplay: a change from their past three albums, which they have referred to as a "trilogy". He said the album featured less falsetto as he allowed his voice's lower register to take precedence. Some songs, such as "Violet Hill", contain distorted guitar riffs and bluesy undertones."Violet Hill" was confirmed as the first single, with a radio release date of 29 April 2008. After the first play, it was freely obtainable from Coldplay's website from 12:15 pm (GMT +0) for one week (achieving two million downloads), until it became commercially available to download on 6 May. "Violet Hill" entered the UK Top 10, US Top 40 (entering the Top 10 in the Hot Modern Rock Tracks chart) and charted well in the rest of the world. The title track, "Viva la Vida", was also released exclusively on iTunes. It became the band's first number one on the Billboard Hot 100, and their first UK number one, based on download sales alone. This was also the first Number One in the UK Singles Chart to be based solely on download sales.Upon release, Viva la Vida or Death and All His Friends topped the album charts worldwide, and was the world's best-selling album of 2008. It hit number one on the UK album chart, despite having come on the market only three days previously. In that time, it sold 302,000 copies; the BBC called it "one of the fastest-selling records in UK history". By the end of June, it had set a new record for most-downloaded album ever. In October 2008, Coldplay won two Q Awards for Best Album for Viva la Vida or Death and All His Friends and Best Act in the World Today. On 9 November, Coldplay were named the World's Best Selling Act of 2008 at the World Music Awards in Monte Carlo. They also picked up two other awards, World's Best Selling Rock Act and Great Britain's Best Selling Act. The band followed up Viva la Vida or Death and All His Friends with the Prospekt's March EP, which was released on 21 November 2008. The EP features tracks from the Viva la Vida or Death and All His Friends sessions and, as well as being available on its own, was issued as a bonus disc with later editions of Viva la Vida or Death and All His Friends. "Life in Technicolor II" was the only single released from the EP.Coldplay began their Viva la Vida Tour in June, with a free concert at Brixton Academy in London. This was followed two days later by a 45-minute performance that was broadcast live from outside BBC Television Centre. Released in late 2008, "Lost!" became the third single from the album, featuring a new version with Jay-Z. After performing the opening set on 14 March 2009 for Sound Relief at the Sydney Cricket Ground, Coldplay headlined a sold-out concert later that same night. Sound Relief is a benefit concert for victims of the Victorian Bushfire Crisis and the Queensland Floods. On 4 December 2008, Joe Satriani filed a copyright infringement suit against Coldplay in the United States District Court for the Central District of California. Satriani's suit asserted that the Coldplay song "Viva la Vida" includes "substantial original portions" of the Satriani song "If I Could Fly" from his 2004 album, Is There Love in Space?. The Coldplay song in question received two Grammy Awards for "Song of the Year." The band denied the allegation. An unspecified settlement was ultimately reached between the parties.Coldplay were nominated for four awards at the 2009 Brit Awards: British Group, British Live Act, British Single ("Viva la Vida") and British Album (Viva la Vida or Death and All His Friends). At the 51st Grammy Awards in the same year, Coldplay won three Grammy Awards in the categories for Song of Year for "Viva la Vida", Best Rock Album for Viva la Vida or Death and All His Friends, and Best Vocal Pop Performance by a Duo or Group for "Viva la Vida". A live album entitled LeftRightLeftRightLeft was recorded at various shows during the tour. LeftRightLeftRightLeft, released on 15 May 2009, was to be given away at the remaining concerts of their Viva la Vida tour. It was also released as a free download from their website. Following the Viva la Vida Tour, Coldplay announced another "Latin America Tour" to take place in February and March 2010, in which they were to visit Mexico, Argentina, Brazil, and Colombia. In October 2009, Coldplay won Song of the Year for "Viva la Vida" at The American Society of Composers, Authors and Publishers (ASCAP) Awards in London.[105] In December 2009, Rolling Stone readers voted the group the fourth best artist of the 2000s. In December 2010 the band released the single "Christmas Lights". The song received very positive reviews, and the music video features the actor Simon Pegg, a close friend of Chris Martin, who plays a violin-playing Elvis impersonator.
