Christina Aguilera refused to hold back in an Atlanta radio interview with the Q100 Bert Show earlier this morning where she was promoting her latest album, Bionic, and upcoming world tour...

Xtina talks about being a "very sexual person," how she and hubby Jordan Bratman still have "Naked Sundays" (TMI!) and the fact that she feels "more confident and comfortable in my own skin" since giving birth to Max.

Speaking of kids, the singer admits she would like to give her son a sibling "eventually." She also feels it's important Max "sees mommy not be ashamed for her sexuality." Slow down, Xtina - he's only two!

Aguilera also rips into Lady Gaga, addressing criticism that she's copying the artist with her new album: "It just comes with the territory. That, in particular, is not even worth wasting the breath to comment on. I've been around for over a decade and I think my work speaks for myself."

Ouch! If she's really so above it, why does Xtina sound so bitter?