It sounds like in the first part, the girls were saying something like Ai is very leader like and big sister like and basically singing her praises. In the second part, they were saying how professional Gaki-san is, like giving good fake smiles(aisou warai, Reina says) for the camera and getting into character for the radio even when she's been talking to the director and Kame before hand.
Something like that. If anyone wants to give a better translation or correct my limited understanding, feel free.