Wonder Girls further established themselves as one of the top girl groups in the country with the hit singles " So Hot " and " Nobody " , which were released in 2008 . After being released as a single in the United States in 2009 , " Nobody " charted at number seventy-six on the '' Billboard '' Hot 100 chart , making Wonder Girls the first South Korean group to enter the chart . The group began their entry into the American market the same year as an opening act for the Jonas Brothers ' World Tour , performing the English version of their songs
Jonas Brothers ' World Tour
Jonas Brothers World Tour 2009
Wonder Girls