[Video] Sunny Hill performs "Grasshopper Song" ft. MBLAQ's Thunder on Music Core

As the sole male member of Sunny Hill, Jang Hyun, will be beginning his mandatory military service, A-list idols will be temporarily joining Sunny Hill on stage.

On January 28th episode of Music Core, alongside Sunny Hill's girls, MBLAQ's Thunder stepped up the stage for the group's "The Grasshopper Song" performance.

Check out the performance below: