Mariah Carey woke up Friday and sang that song, so you know it's the beginning of the Christmas season. The diva posted a video of herself waking up on Nov. 1 and answering a call from Santa, and so begins the seemingly nonstop advertising for holiday spending deals. Target has announced free delivery through Dec. 21 with no minimum purchase. Walmart says "The holidays officially begin." And Amazon is heralding "Happy Holideals," with specific sale items featured daily.