♬ Download on iTunes : https://itunes.apple.com/us/album/haengbog-happiness-single/id905840092?ls=1
♪ For more information
☞ smtown hompage : http://www.smtown.com
☞ smtown Red Velvet : http://redvelvet.smtown.com/
☞ facebook SMTOWN : http://www.facebook.com/smtown
☞ facebook Red Velvet : http://www.facebook.com/RedVelvet
☞ SMTOWN Official YouTube Channel : http://www.youtube.com/smtown
☞ Red Velvet Official YouTube Channel : http://www.youtube.com/redvelvet
♬ Red Velvet 레드벨벳_'행복(Happiness)'_KBS MUSIC BANK_2014.08.08 ℗ S.M.Entertainment