Wonder World by Wonder Girls

Wonder World is the second studio album by South Korean pop girl group Wonder Girls. It was released on November 7, 2011. It was produced by Park Jin-Young. "Be My Baby" served as the lead single from album. Both album and single were commercial success. Album was promoted with a Wonder World Tour in 2012. Members were more involved in songwriting in production: Park Yeeun wrote and produced "G.N.O." and "Me, In", Kim Yubin wrote "Girls Girls", "Me, In" and "Sweet Dreams" while Woo Hyelim wrote and produced her solo song "Act Cool", featuring San E. Members also recorded duets: Min Sunye and Yeeun recorded "Long Long Time" while Yubin and Ahn Sohee recorded "SuperB".