SG Wannabe's Lee Suk Hoon, who appeared on 'Produce 101' season 2 as the vocal trainer, surprised many viewers�with his impressive performance of ''Pick Me'' on 'Yoo Hee Yeol's Sketchbook'. The ballad singer revealed that he dedicated many hours for the special performance.�

On the June 21 airing of 'Kim Shin Young's Hope Song at Noon', DJ Kim Shin Young commented, "I saw Lee Suk Hoon's 'Pick Me' yesterday. I was so surprised."

Lee Suk Hoon responded, "I worked really hard. I also winked 3 times. I've been promoting for a long time but a lot of people asked if it's really me because they've never seen me like this. I practiced for 4 hours for 4 days."

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Lee Suk Hoon brought laughter as he added, "I have (finally) met dancing in my mid-30s. I'm planning to try krump later on."

Check out Lee Suk Hoon's amazing performance of ''Pick Me'' in the clip!