Oops! She let something slip again!

Britney Spears might have said too much when asked about long-time friend Zoe Saldana's pregnancy. The "Guardians of the Galaxy" star and her husband Marco Perego seem to enjoy lying low when it comes to their personal life. But well, sometimes things just happen to get revealed by your besties...by mistake.

In a recent interview with Entertainment Tonight, Britney Spears was asked if she would do another movie with Zoe Saldana who she worked with on "Crossroads" in 2002.

"Who knows? That's a very good idea. But she's pregnant with twins now. So I'm sure she's got a huge future ahead of her" Britney Spears said. Just like that, Britney Spears revealed to the public that the "Avatar" star is having twins before Saldana herself could.

Saldana, 36, and husband Perego recently confirmed that they were expanding their family while doing the ALS Ice Bucket Challenge last month. The very private couple have yet to confirm that Saldana is having twins. Spears and Saldana were spotted at the Los Angeles airport on Monday confirming that Spears slip of the tongue might be indeed true. They seem to have cultivated a long-lasting friendship since they met more than a decade ago.

Spears, as a mother of two herself, offered some advice to Zoe: "You're not ready. You don't know what you're in for."

The Dominican actress is sure to take her friend's confession lightly as she describes Spears to be "a very beautiful human being."

"After I worked with her, I realized that there was a reason why she was the most popular pop artist over so many other pop artists at that time who were more talented, had better voices," Saldana told Allure in 2013. "And it was because of her heart, her soul."

Do you think Saldana will confirm she's having twins sooner than planned because of this big reveal? Or do you think she will hold her ground and remain private about her twins?