seven million units. It won five Grammys: Best Rock Album, Best Rock Song ("Dani California"), Best Rock Performance by a Duo Or Group With Vocal ("Dani California"), Best Boxed Or Special Limited Edition Package, and Best Producer (Rick Rubin). The first single, "Dani California", was the band's fastest-selling single, debuting on top of the Modern Rock chart in the U.S., peaking at number six on the Billboard Hot 100, and reaching number 2 in the UK. "Tell Me Baby", released next, also topped the charts in 2006. "Snow (Hey Oh)" was released in late 2006, breaking multiple records by 2007. The song became their eleventh number-one single, giving the band a cumulative total of 81 weeks at number one. It was also the first time three consecutive singles by the band made it to number one. "Desecration Smile" was released internationally in February 2007 and reached number 27 on the UK charts. "Hump de Bump" was planned to be the next single for the US, Canada, and Australia only, but due to positive feedback from the music video, it was released as a worldwide single in May 2007. The Stadium Arcadium World Tour began in 2006, including several festival dates. Frusciante's friend and frequent musical collaborator Josh Klinghoffer joined the touring band, contributing guitar, backing vocals, and keyboards. The band was the musical guest for Saturday Night Live, which aired in May 2006 with featured host Tom Hanks. 2008–2009: Klinghoffer replaces Frusciante Following the Stadium Arcadium tour, the Chili Peppers took an extended break. Kiedis attributed this to the band being worn out from their years of nonstop work since Californication. Their only recording during this time was in 2008 with George Clinton on his album George Clinton and His Gangsters of Love; accompanied by Kim Manning, they recorded a new version of Shirley and Lee's classic "Let the Good Times Roll". Kiedis, who had recently become a father, planned to spend the time taking care of his son and developing a television series based on his autobiography, Spider and Son. Flea began taking music theory classes at the University of Southern California, and revealed plans to release a mainly instrumental solo record; guest musicians included Patti Smith and a choir from the Silverlake Conservatory. He also joined Thom Yorke in the supergroup Atoms for Peace. Frusciante released his album The Empyrean. Smith worked with Sammy Hagar, Joe Satriani, and