If, as their little red outfits seem to suggest, the RADIO CITY ROCKETTES really are among Santa's "special helpers," then we're thinking Mrs. Claus better keep a close eye on her beloved chubby. Admired since 1933 for their gorgeous dancing skills, agile personalities, and long, firm, silky thighs, the Times Square high kickers are back in town through Dec. 4 to spice up your sugar plum dreams with The Radio City Christmas Spectacular. And for the kids (and your cover): dancing teddy bears, wooden soldiers, snowmen and reindeer, a nativity, and rapping (yes, we spelled that right) elves. $26.50-$59.50. Thurs.-Fri., 2 and 7:30 p.m.; Sat., 11 a.m., 2, 5 and 8 p.m.; Sun., noon and 3:30 p.m. Fox Theatre, 660 Peachtree St. 404-881-2100. www.foxtheatre.org.