SEE ALSO: "Nothing can break our bond," SEVENTEEN talks best album '17 IS RIGHT HERE,' teases another album and tour later this year

Members S.Coups (Seungcheol) and Hansol made fans swoon with their deep voices as they rapped 'like a loose cannon,' which was definitely a treat for those who've missed them. In other news, Seventeen will perform as a special guest at Brand New Music's BRANDNEW YEAR 2014' concert to be held at Olympic Hall, Seoul on December 7 (SUN) at 6 PM KST!

Check out the mixtape below!