Christina Aguilera surely can't pretend not to know who GaGa is much longer!

To keep the momentum going, the flashy 22-year-old songstress and her manager made their way through Los Angeles International airport Sunday, where they caught a flight to London.

Wearing a black blazer (opened to reveal her black bra) and leather pants, native New Yorker Lady GaGa (real name: Joanne Stefani Germanotta) got playful with photographers while she waited at the ticket counter, and flashed her bootylicious side to them.

The singer certainly isn't opposed to the attention—she has a song called "Paparazzi" on her album, The Fame!

And, unlike the actions and expressions of some camera targets, the song isn't telling the photographers to go away.