While “American Idol” season 3 finalist Jennifer Hudson rehearsed for her big July Fourth show on Tuesday night, “American Idol” season 10 winner Scotty McCreery (pictured) headlined the New England Warrior Benefit at the Seaport World Trade Center. The event raised money for families of wounded and fallen US Special Forces troops. McCreery, who sings country, tweeted after the event, “yall have been mighty good to me Boston . . . see yall again soon!”