Here IU is performing the song Dreaming, which her character Pil-sook composes in the drama Dream High, but with altered lyrics.
You might remember the clip i posted from another of IU’s (numerous) appearances on Sketchbook and how infatuated the host, Yoo Hee-yeol, was by her. This time IU changed the lyrics to describe him:
Sharp eyes like a hawk, forehead like the Pacific Ocean, small and cute shoulders~ Established appearance from behind, a white face, with a warm way of speaking~ Did you miss me? Don’t just laugh~ I know how you feel, uncle~ Even when you’re coy, I know. You can fool a ghost but you can’t fool me~ Step by step, nervous footsteps, with excitement~ I prepared this much today~ I missed you, uncle~
It’s so cute when she sings “나 보고 싶었어?” (did you miss me, informal) and then adds the polite “요?” (yo), since she’s singing to an “uncle” 
.
credit: translated lyrics from allkpop
2011-05-30 (Mon) 21:22
Cant blame him, she is so amazingly cute
2011-05-30 (Mon) 23:58
I’d probably also be hawk-eyed if I was sitting next to IU.
I have some random videos on my PS3 and if I’m skipping through them I always stop and watch when one of IU’s acoustic bits comes up. Can’t not watch
.
2011-05-31 (Tue) 20:42
Exactly. She’s prety mesmerising when she sings gently like that. The guy cracks me up though, love written all over his face.