The songs of Letong musicians are very nice.
Kwon Ji-yong & Kim Yoon-ah "missing you"
Soyou & Jung Ki-goo "Some"
IU & Kim Chang-wan "The Meaning of You"
IU & Im Se-yong "Nagging"
Jo Kwon & Son Ga-in "We Are in Love"
Hook Gak & Jung Eun-ji "Short Hair"