7 is the fifth studio album by Greek singer-songwriter Michalis Hatzigiannis. The first studio album released following his 2006 4× platinum Fili Ki Ehthri, it is entirely composed by Hatzigiannis, and was released by Universal Music Greece on October 29, 2008. It was certified Platinum in the first week of its release, and was later certified 2× Platinum within a month for 60,000 copies and becoming the best-selling album of the year in Greece. After IFPI lowered their sales thresholds in 2009, the album was certified 5× Platinum for the same sales, making it his most successful album in terms of certifications, but his second least successful studio album overall in Greece, following his debut Paraxeni Giorti.