This week at Durham Performing Arts Center is brought to you by the letters A and X – A as in “American Idol,’ and X as in XMAS. Let’s just go ahead and give Christmas an X-rating, since Thanksgiving is scarcely over and here come the holiday shows. First up is 2011 “Idol” winner and Garner homeboy Scotty McCreery on Tuesday’s QDR “Country For Kids” show at DPAC, which you can count on being holiday-focused given that “Christmas With Scotty McCreery” (19/Mercury Nashville Records) just came out. Then on Thursday, season-two runner-up “Idol” Clay Aiken brings his “Joyful Noise” show to DPAC (see page x), complete with orchestra for all your holiday favorites. See dpacnc.com for details.