Christina Aguilera's got a terrific set of lungs.

And the always-jawdroppingly gorgeous songstress is showing them off--aurally and visually--in a new promotional photo shoot for her upcoming greatest hits collection.

Straddling a rocket, cradling a pair of penis-shaped phones in her fists, lounging seductively on a couch that resembles pursed lips, and lying on the floor with her 10-mile-long legs spread wide, Xina looks more like XXXina in some of her most amazing, bra-busting pics to date.

"Promo", after all, looks very close to "porno".

For more promo pics of Christina as Boobarella, head over to Hollywood Tuna.