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She may not have had any nice words for Lady Gaga the other day, but Christina Aguilera definitely doesn't mind showing Blondie's Debbie Harry some respect!

Yesterday we snapped the pop diva out and about in New York City with her husband Jordan Bratman, and she wasn't in the best mood, but Xtina did sign a few autographs as she stomped back to her car. Hmm, maybe she could learn a thing or two from Gaga on how to treat her fans? You know the Alejandro singer would do it with a smile on her face!