Mnet's M! Countdown is back with another episode of great performances and musical treats. Besides the usual stages, there were comebacks for 5dolls and Lim Jeong Hee, while Jay Park made his debut as a solo artist. Meanwhile, INFINITE begun follow-up promotions. It was a battle between last week's winner f(x), Jay Park, and Park Bom for the #1 spot on M! Countdown today, and in the end, it was f(x) who managed to fend off the challengers and pick up their second consecutive #1 on the show! And unlike last week, the girls were present to collect their trophy. Congratulations to f(x) on their win! Songs that charted this week. Today's alternative chart featured a Pump It Up competition between Rainbow, 4minute and Dal Shabet plus a special appearance from CNBLUE (only the 4 were shown). Guess who won? Other performers who stood on stage included A Pink, SISTAR19, Untouchable, Rainbow, U-Kiss, SpinEL, Yoon Gi Won, Kim Tae Woo, Go Eun, CNBLUE, 4minute, and Clover. Check out their performances below!