This means war.

It's the first time such a thing has happened. This weekend's music programs are stacked with comeback stages - nine groups are sharing the stage for their comeback to the fall music scene.

First up is IU. She released her third album Modern Times on October 8th, and her songs are currently sweeping the charts. She will perform her first comeback stage on Mnet's " M Countdown" with her title song, "The Red Shoes". As her album showcase event showed, her concept is freedom, and she will perform with energy and fun but with a more mature twist.

SHINee will be also on the stage with their new single, "Everybody". It's a dance song that not only showcases SHINee's perfect performance skills but also their growth as a national idol group. Their song and dance are easy to follow and is poised to be big hit.

T-ARA chose to perform onstage the same day their album drops. Their comeback stage will be with the song "Number 9", written by Shinsadong Tiger, who also wrote their two biggest hit songs, "Roly Poly" and "Bo Peep Bo Peep".

Kahi is making a comeback as a solo artist after leaving After School. Following up on the teaser to the music video for the title song, "It's ME", she has hinted on a performance heavy stage that will be both sexy and lively.

Jung Joon Young, who was picked up from "Superstar K4," is releasing his first single, "10 Minutes Before the Breakup". The song is a rock ballad, a genre that hasn't been receiving much love of late, but Jung Joon Young's strong performance may breathe life in the genre. Jung Yoo Mi, his virtual wife on the show "We Are Married", appears in the music video for the song.

Nine Muses have turned on the sexy for their comeback stage. Their first official album, "Prima Donna", is being released on the 14th. Their title song, "GUN", is a dance song that goes well with their sexy concept.

Girl group AOA is also wearing sexy as their concept as they comeback with the song "Tempted". They have totally and successfully changed their concept from cute and pure to dark and sexy.

MYNAME is also making a comeback with their tile song "Day By Day". Legendary performer and producer Deux Lee Hyun Do (D.O.) produced and featured in the song for them. This is the first time Lee Hyun Do has helped out an idol group. It will be interesting to see if D.O.'s musical prowess will give them the edge in a sea of great performers and singers.

Boys Republic is returning to their fans as men, not boys. Their single "You Are Special to Me" was produced in Europe by top European producers Dsign music and D3O under the producing of Park Keun Tae. They will be able to show their manliness through the performance of this song.

All nine teams mentioned are taking the stage on the same day for the same program - talk about stacked. With talented rappers like Kim Jin Pyo also releasing their singles this fall, it will be interesting to see who will be left standing in the chart and music program battles that will ensue.