As many fans know, 2PM's club track "Hands Up" owes its vibe to its bright synth loops and addictive melody, brightened with the addition of a cute adlib by none other than the Wonder Girls' Sohee two minutes into the song. Today, J.Y. Park revealed that Sohee contributed more than just her voice for the production of this track. On his me2day and Twitter, the producer revealed, "The Wonder Girls' Sohee fixed the melody of 2PM's "Hands Up". If she hadn't done so, the song would've been different. This is why it says, "advised by Ahn Sohee," in 2PM's album. Miss Sensible, please continue your constructive advice~^^" Netizens commented, "I wonder what kind of changes were made to the melody," "Sohee is a quiet force,"  "She must have exceptional talent,"  and, "I want to hear addictive songs by the Wonder Girls too!" In related news, Sohee turns 19 (20 in Korean years) today -- happy birthday to her! Source: Newsen via Nate, TVReport