Jun Matsumoto
is a song recorded by Japanese boy band Arashi. It was released on March 7, 2012 by their record label J Storm. "Wild at Heart" is the theme song for the drama "Lucky Seven" starring Arashi member Jun Matsumoto. The song has been described as an "energetic rock" song complementing the drama. The single debuted at number-one on the Oricon daily and weekly charts. It is the group's 26th consecutive number one single.