Though acting is definitely one of Lee Jong Suk's strong suits, he admitted that he's pretty bad when it comes to singing.

On the June 5th episode of 'One Night of Entertainment', the actor appeared to promote his new SBS drama 'I Hear Your Voice' and confessed he was tone-deaf.

Lee Jong Suk commented on his career thus far, saying, "My career really took off after 'Secret Garden'. The writer helped me out a lot." He then added, "I can't sing well. On 'Secret Garden', I failed multiple times, so they used someone else's voice," revealing he had to lip sync to complete one scene. 

He also revealed, "I'm close to Girls' Generation's Taeyeon, [KARA's] Hara, and IU, and I like 4minute's HyunA."

Did you know that Lee Jong Suk wasn't actually singing? Check out the scene yourself!