The friendship between the Shinhwa members has been headlining once again ever since Eric made a surprise cameo in Teen Top's music video teasers. Many were confused by his appearance at first, wondering whether Eric himself was making a comeback, but it was finally revealed that Eric had subbed in for�Andy to support and promote the group's comeback. (Teen Top was produced by Andy, but the Shinhwa member is currently serving in the army). Even though he finished filming his segment, Eric had stayed behind afterwards to encourage and monitor the Teen Top members. His help definitely paid off, as his seconds-long appearance in the group's teaser created enough buzz for the video to rank on major portal and video sharing sites. Teen Top has currently released two of three teasers, and will be releasing their final teaser at 5 PM KST on January 10th. Their second single, "TRANSFORM," will be released on the 13th. Source + Photos: Newsen via Daum