At their showcase debut on 2nd September, f(x) apparently performed a song called Mr. Boogie which isn't in their Lachata single album, but would probably be included in future albums. If you were one of those who were disappointed with Lachata being their debut single, Mr. Boogie is definitely much more amazing than the former. Check out the audio clip. Many thanks to SpikeNeedle for the tip. credit: XxtenerifexX Don't forget to check out our friends @ the Aff(x)tion Forums!