Infinite held their first concert 2012 Infinite Concert "Second Invasion" in Seoul's Olympic Stadium on February 11–12 and in Tokyo International Forum on February 25–26.
The encore concert, 2012 Infinite Concert "Second Invasion Evolution" was held in Seoul's Olympic Stadium on April 1.

The group's second Japanese single was released on April 18.
It included the Japanese version of their song "Be Mine" as its title track, as well as a Japanese version of "Julia".
It peaked at #2 both in Oricon Daily and Weekly Charts.
Total reported sales amounted to at least 54,218 copies.

The group's third mini album INFINITIZE on May 15.
On June 14, Infinite took their first triple crown on M!
Countdown with "The Chaser", which achieved the top spot on the charts for three consecutive weeks.
At the end of the year, Billboard named "The Chaser" the number one KPOP song of the year.
Infinite held their first concert 2012 Infinite Concert "Second Invasion" in Seoul's Olympic Stadium on February 11–12 and in Tokyo International Forum on February 25–26. The encore concert, 2012 Infinite Concert "Second Invasion Evolution" was held in Seoul's Olympic Stadium on April 1.
The group's second Japanese single was released on April 18. It included the Japanese version of their song "Be Mine" as its title track, as well as a Japanese version of "Julia". It peaked at #2 both in Oricon Daily and Weekly Charts. Total reported sales amounted to at least 54,218 copies.
The group's third mini album INFINITIZE on May 15. On June 14, Infinite took their first triple crown on M! Countdown with "The Chaser", which achieved the top spot on the charts for three consecutive weeks. At the end of the year, Billboard named "The Chaser" the number one KPOP song of the year.
Infinite (band)