It looks like girl group T-ara have been having a disco party of their own while getting ready for their "Roly Poly" performance on Mnet's�"M! Countdown". The girls were met with photographers at their regular hair salon in Cheongdam, where they were getting their weekly retro hair and makeup done to match the fun concept of their latest title track. Check out the cute pictures down below! [gallery] Source: Star News via Nate, Newsen via Nate