In 2010, Sunmi left the group to pursue an academic career and was replaced by Hyerim prior to the Korean & US releases of the single "2 Different Tears". Their second studio album, "Wonder World" (2011), yielded the successful single "Be My Baby". In 2012, Wonder Girls starred in the TeenNick movie "The Wonder Girls", and released their last three singles as a quintet, notably "Like This" and "Like Money", before going on a three-year long hiatus. In 2015, it was announced that Sunye and Sohee decided to leave the group while Sunmi would resume promotion with the remaining members. The four-piece adapted a band-oriented concept for their acclaimed third and final studio album, "Reboot" (2015), and the number one 2016 single "Why So Lonely".