Singer Seo In Young made her comeback stage performance on Mnet's "M! Countdown" today with her new song, "Let's Dance."

She was called the 'dancing queen' with her amazing disco stage performance.

Seo In Young had set up her own entertainment company back in August and had released her first digital single, Anymore.

Her new song, "Let's Dance" features a 70s disco club style mixed with the music of today to create a fun and quirky dance song.

After today's performance she plans to officially start her new album activities.