SISTAR expressed Jung Jun Ha's woes with their hilariously sexy performance of "Alone".

On the June 1st broadcast of 'Infinity Challenge', SISTAR made a surprise appearance to cheer on Jung Jun Ha. If you remember, he had been laid off 'Muhan Company' in a previous episode, a victim of staffing and budget cuts.

Serenading him with a version of their hit song 'Alone', the girl group attempted to boost some life into the pain-stricken former employee. However,

Jung Jun Ha, who really felt 'alone', couldn't contain his tears even with the girl group members by his side.

Check out the full episode below! 

(SISTAR's performance starts at the 21:40 mark).