Heechul talked about his disappointment in this year's 'Infinity Challenge Song Festival' on the November 7 episode of 'Ssul Jeon.'

SEE ALSO: Check out the performances from the '2013 Infinity Challenge Music Festival'!

He said, "2007, 2009, 2011, 2013...  I thought this year's was the worst," and went into what he thought was the problem, "First of all, in relation to BoA and Gil's performance, Gil is really charismatic when he does hip hop performances, but whether he still feels awkward on 'Infinity Challenge,' he just kept smiling awkwardly and maybe they put on the song a lot, but it was obvious he wasn't singing most of the time."

Netizens wrote, "It's true it was the worst, but don't blame it on Gil.  To be more accurate, the problem was the song BoA chose because it was not good and immature", "I agree, it wasn't as good as past years", and "Maybe I'm in the minority but I liked all the songs this year".

Watch the performance below to see if you agree with Heechul's opinion.