Jennifer Aniston (Getty Images)

Justin Theroux was Jennifer Aniston’s personal shopper, helping her pick out lingerie at Barneys in New York on Tuesday. A spy said of the romantic couple, “They were in the lingerie department . . . She looked beautiful, and they were both very nice.”

PHOTOS: JENNIFER ANISTON

Aniston, who showed off a boosted cleavage at the Glamour awards on Monday, may have been searching for items for her curvier figure. A Barneys rep declined to comment. Aniston’s rep didn’t get back to us.