There is no denying that Britney Spears is one of the biggest pop stars in like … Ever. One thing we are learning is that Brit Brit is probably one of the coolest and most fun moms ever, too. The singer popped by KISS FM UK to promote 'Femme Fatale' and her new single 'Criminal' (before the pistol-packing drama surrounding the video shoot) and revealed that she had a Spider-Man and Batman-themed birthday bash for her son Jayden James, who turned five on Sept. 12.

Brit, with her hair pulled back in a high ponytail, lit up when talking about her youngest baby, saying that her son "is so obsessed. We had four Spider-Man costumes. All the kids had on costumes. I didn't dress up at all."

What, no dress up for Mommy? Not even as Catwoman? Remember that red latex catsuit she wore in the 'Oops…I Did it Again' video? She could have dragged that out of storage.

She went on to say that she and boyfriend Jason Trawick -- and she almost called him her husband -- sometimes dress up in costume. We don't want to know anymore! TMI Alert! Just kidding, Brit. We totally got what you meant and that you weren't talking about the bedroom!

Brit also talked about how she'd like to try her hand at acting again. She said, "I haven't been focusing on that right now. I've been focusing on music. Maybe next year, I'll experiment in that world and see
what happens!"

Brit back on the big screen? We're all for it. 'Crossroads' didn't begin to scratch the surface of her talents!

Watch the Britney Spears KISS FM UK Interview