A rep from the 'Gayo Daejun' revealed on December 24, "IU plans to perform 'Twenty-three' at the 'SBS Gayo Daejun' airing on December 27. There will also be collaborations with the hottest singers of 2015. We ask that Ты look вперед to it." The upcoming SBS event, '2015 SAF Gayo Daejun', is running under the theme "Making Happiness with Music, Музыка Together."
IU will also be hosting the event alongside Shin Dong Yup. The 'SBS Gayo Daejun' will air on December 27 at 9:40PM KST!
Source: link