f(x) is back with 'Diamond' and '4 Walls' on Music Core!

The girls of f(x) are finally back on Music Core!

Witness the amazing stages from Amber, Luna, Krystal, and Victoria.  Here are their 'Diamond' and '4 Walls' performances from the November 7th episode of Music Core~

♥ Buy f(x)'s 4th album '4 Walls'

♥ More about f(x)'s '4 Walls' here