T-ara have been rocking stages right and left with their hit song, "Roly-Poly", and it's become so popular that they've extended their promotions with a new version called, "Roly-Poly in Copacabana"! "Roly-Poly in Copacabana" was named after a popular disco club from the '80s, and this new version fuses that disco feel with more modern sounds. The result is a catchy hit that's perfect for the summer season. Check out their 'Music Core' stage below!