Christina Aguilera article-1040150-0220785A000.jpg Photo courtsey of Mark Seliger for Macy's

Macy's asked Christina Aguilera to be a part of their 150th birthday celebration - and boy, did she ever come through! Check out this pic from her photo shoot - don't you just love that long burgundy skirt?

Meanwhile, Xtina's still hard at work on her follow-up to Back to Basics; just last night, we caught her swinging by the studio for a little late-night work. We can't wait to hear what she comes up with!