Credit: Michael Rozman/Warner Bros.

Jennifer Lopez wants to clear the air.

Joined by costar Cameron Diaz, the actress and mother-of-two appeared on The Ellen DeGeneres Show Tuesday, where she dispelled rumors about wanting to adopt a baby with Casper Smart, 25, and suffering from postpartum depression after the February 2008 birth of twins Max and Emme (with ex-husband Marc Anthony).

"I know I'm being misquoted in the press a lot," Lopez, 42, said. "[They say that] I want to adopt and I had depression when I had babies -- none of that's true."

The What to Expect When You're Expecting actress explained: "I never really thought about adoption before this movie, ever. I just thought, 'I'm going to have my own kids.' I never thought about it as something I would do." (Lopez stars as a woman named Holly who adopts a baby from abroad with her husband, played by Rodrigo Santoro, 36.)

"After doing the role and holding these babies, you can see how you can take a baby that you don't know and who, you know, needs a home," Lopez admitted. "You can give them a home a raise them as your own. . . Through the character I came to understand how people do it, because before I never really thought about it."

Addressing the postpartum depression rumors, Lopez said her sadness only lasted a short period. "I had what they called the 'baby blues,' which is when your hormones drop and you get very emotional," the American Idol judge said. "[In the pregnancy guide What to Expect When You're Expecting] they're like, 'You might be feeling every emotional today.' I said, 'Yes, I am. That's what'’s happening to me right now.' So those are the two stories that people ran away with a little bit."