He was a guest on MBC Every1's 'Video Star'. As Seulong has had many duets with female singers, he talked about IU as one of the best duet partners he's had. The duo sang the hit "Nagging" back in 2010.
He said, "Out of all the singers that I've had a duet with, IU has the most feminine charms. She knows how to steal the hearts of the public."
The full episode will air at 8:30 PM KST on the 27th!