information was released about the English-language album. JYP Entertainment's CEO Park Jin-young hinted on his Twitter account that he had written a new song for the group while recording in the drama Dream High and later tweeted that other producers were involved in producing the album. Rainstone of JYP Entertainment said that the album was expected to have six to seven tracks. Producer Rodney "Darkchild" Jerkins and the Grammy-nominated singer-songwriter Claude Kelly were revealed to be participating in the album and that the album was to be released by one of the three major labels of America. On June 30, it was announced on their official website that the girls had been invited to perform at the 2011 Special Olympics closing ceremonies in Athens, Greece. They performed the traditional Korean folk song "Arirang" along with "Nobody" sung in English and "Tell Me" sung in Korean. On August 5, The Wonder Girls appeared on Billboard.com's Mashup Monday program, performing a self-arranged cover version of B.o.B and Bruno Mars' "Nothin' on You". On October 9, 2011, a representative revealed, "The [English-language] album will be produced in a movie OST format. We'll be planning our concept to fit around the feel of the song, so as opposed to retro, we feel that it will be more pop. The Wonder Girls will definitely be coming out with a new image, so please look forward to it." On October 23, JYP revealed a new poster, "R U Ready?", hanging over their company's building with a new version of the Wonder Girls' logo. Wonder World was announced as the group's second full-length album and was released on November 7, 2011 along with the single "Be My Baby". The album featured more writing and production input from the group members. Promotions for Wonder World began with a comeback stage on Music Bank on November 11 and continued through January 2012. The group returned to American activities with their made-for-TV movie The Wonder Girls in early 2012. "The DJ Is Mine," an English-language song featuring School Gyrls, was released as a promotional tie-in single for the movie on January 11. "The DJ Is Mine" reached number one on several Korean charts. The movie premiered on February 2 on the TeenNick channel, and featured the then-unreleased English song "Like Money". Following the release of the movie, the group received proposals from major broadcasting companies in the United States, and