T-ara has unveiled two jacket cover posters for their comeback album, "John Travolta Wannabe"! The covers are a re-creation of movie poster styles from the '70s and '80s. The seven members transformed into 'high teen princesses', and are aiming to target music fans both young and old with this retro concept. Their title track, "Roly Poly", was purposely kept simple in both melody and choreography to create an addictive effect. Thanks to the title, the girls are also receiving free support from a snack brand with the same name. Core Contents Media revealed, "T-ara is receiving the support of 'Roly Poly' snacks free of charge. During promotions for 'Bo Peep Bo Peep', the girls had received free toilet paper from a company of the same name. Based on this continuing trend, we feel like this promotion cycle will be another hit." The girls will be making their comeback on next week's episode of KBS's "Music Bank." Source + Photos: Star News, Sports Chosun via Nate