Aguilera Uplifting in China

Christina Aguilera took a voluptuously hot minute to answer some questions in Shanghai ... but reporters found it difficult to pay attention. Can't hold 'em down!

The pop star's eye-popping push-up put reporters off their purpose during the "Back to Basics" tour presser.

There have been rumors that Xtina is preggers. As usual, she's milking the publicity for all it's worth.