Lion Heart is the fifth Korean studio album and the eighth overall by South Korean girl group Girls' Generation. It marked their first record as an eight-member group since the departure of member Jessica in September 2014. Lion Heart experienced commercial acclaim in South Korea. It debuted atop the Gaon Album Chart on the chart issue dated August 22, 2015, and remained on the top spot for a further week. Two weeks after its debut chart appearance, it dropped 35 positions, charting at number 36. Lion Heart was the best-selling album of August 2015 in South Korea, selling 131,228 physical copies, while overall being the 13th most-sold album of 2015 in that country with total sales of 145,044 units. Lion Heart additionally charted at number 11 on the Japanese Oricon Albums Chart on the chart issue dated August 31, 2015, while peaking atop the Billboard World Albums chart and becoming the group's second number one following their 2013 album I Got a Boy.
The songs "Paradise" and "Bump It" was co-written and produced by Dsign Music.