They performed their 2nd single, Oh My God! as well as their newest single, Nagiichi. This was the first time Nagiichi was being performed live in full. The performance can be seen here.
Alternate links just in case:
Omaigaa my girls are greatttt!!
The energy, the spirit...melovess! Soo genki and kawaii!!
All of them looking fine too =D
Nagiichi full perf is sooo wonderful. My flawless girls 8D