If Teddy Ruxpin wasn't feeling stupid before, his ass should now.  Christina Milian was spotted working out in an uber hot look that showed off her post-baby cakes.  And it looks like she's only blue with fabness, not the divorce.

Chris just filed her own papers with the courts that exposes The Dream as a cheating liar.  We've got more pics and the deets when you read on...

Christina just responded to The Dream's divorce filings that said he and Chris were "separated" when he filed for divorce.  Chris says that bullsh*t.  They weren't separated and they had sex many times during this alleged "separation"...and he snuck in some no-alimony papers for her to sign when she was bed ridden and 9 months pregnant!  According to TMZ:

Milian is pissed over The-Dream's claim that they were legally separated when he filed the divorce docs back in February ... just nine days before she gave birth to their daughter.

In her legal response, filed last week in Georgia, Milian claims the marriage wasn't really kaput when he filed the divorce docs -- and subsequently had "marital relations on numerous occasions."

But Milian also claims that if the court does grant the divorce -- it shouldn't be based on The-Dream's claim that the marriage is "irretrievably broken" -- but rather because the The-Dream was cheating on her.

But it gets worse ...

In the docs, Milian admits that she signed a settlement agreement with The-Dream in which both parties waved any alimony or ownership right's to the other person's property.

But Milian claims she only signed the docs because The-Dream brought them to her bedside when she was 9-months pregnant ... when she was in no condition to sign such important papers.

That's some real low down ish Terius.

Meanwhile, Christina worked on getting her body in even more tip top shape in L.A. this week:

Revenge is best served HOT afterall:

We're not even mad....