ClariS(クラリス,Kurarisu) is a Japanese pop music duo and idol unit which formed in 2009 with singers Clara and Alice from Hokkaido, who were in junior high school at the time. The pair began singing covers and submitting them to the Niconico video sharing website between 2009 and 2010. ClariS later signed to SME Records and released their debut single "Irony" in October 2010. Three more singles were released between 2011 and 2012, followed by their debut album Birthday (2012). Birthday was awarded a Gold Disc by the Recording Industry Association of Japan for having exceeded 100,000 copies shipped in a single year. Six more singles were released between 2012 and 2014, which were featured on their second album Second Story (2013) and third album Party Time (2014). Alice left the unit following Party Time's release, and Karen joined ClariS in late 2014.