T-ara's first extended play (EP) was released in 2010. It is called "Temptastic". It lead to two Gaon top five singles. These were "What's Wrong" () and "Yayaya". In 2011 T-ara released the EP called "John Travolta Wannabe" (). It made it to number three on the Gaon Album Chart. It lead to the single "Roly-Poly", which made it to the first place on the Korea K-Pop Hot 100 chart. It became the highest-selling digital single of 2011 in South Korea. It had over four million digital downloads.