IU attended G.Gorilla and actor Kim wedding on November 2th. She appeared not only as a guest but also sang a wedding song there, and it attracted people interest in IU' income from the performance.
A-class singers wedding songs cost about 1000~2000 milllion krw (60,000~120,000 usd) , but IU's price is probably higher than it.
In addition, netizens commented on the news," Last time my friend seemed to spend 300 million won to invite a singer to sing a wedding song","I want IU to sing at my wedding too","I want a wedding song too but the price is too expensive", and so on