As a child actor, Lee Hongki of FTISLAND has been in the public eye for a long time, so it was quite easy to find photos of him in his younger years. He always had quite a strong eyelid crease, so I don’t believe his big, doe-eyes are the result of double eyelid surgery. He does appear to have had a nose job at some point, as his nose is a bit narrower and smaller than previously. His nose bridge is also slightly more prominent.
It’s worth noting that, for an adult male, he has quite strong but wildly fluctuating aegyo sal. This would suggest that he gets fillers once in a while to keep them looking plump.
Before and after pics