Popular groups BEAST and f(x) will be both making a comeback through Mnet "M! Countdown" today.

BEAST has been taking over the charts with their song, "Shadow" and will be performing for the first time on a music program since their album release on July 19.

f(x) will be making their first comeback in over a year with their song, "Rum Pum Pum Pum" and has fans excited. Their new song is a fun pop dance song that many will enjoy.

Other groups such as Koyote and singer Lee Jung Hyun will also be making a comeback today.