User:PogingJuan/sandbox/Nagging (IU song)

"Nagging" is a song recorded by South Korean singers IU and 2AM's Lim Seulong. Written by Kim Eana and composed by Lee Min-soo, the pop ballad duet was used as one of the theme songs for the second season of the variety show, We Got Married, along with "We Fell in Love" by 2AM's Jo Kwon and Brown Eyed Girls' Ga-in.

The song was released on June 3, 2013 and was re-relased under the title "Ko Go To" (コ・ゴ・ト) on December 14, 2011 as part of IU's first Japanese extended play I□U.

Release and reception
"Nagging" is a pop ballad. The song was a commercial success in South Korea. The single debuted at twelve on the Gaon Digital Chart and shot up to number-one position the following week, where it remained for three weeks.