LOL-Britney Spears goes Jackass in a deleted scene from Jackass 3D video)

  As Britney Spears' Femme Fatale promo tour of robotic e-mail interviews and spangly short-shorts shuffles its way across America, the pop star reached Jimmy Kimmel Live last night. Pre-taped performances have been de rigeur for Brit these last few days (re: her recent appearances on Good Morning America). But for Kimmel, Spears ramped things up a notch -- doing two skits for the show.

You can watch both of them below — but the one that you're more likely to think is the sh*t, so to speak, features Spears hanging out with a bunch of guys who were also way bigger on MTV about 10 years ago: the Jackass crew.

The set-up? Fun fake fact: Spears was in a deleted scene from Jackass 3D, doing a stunt called the "Poo Cocktail Supreme." So, basically, it's Britney Spears -- or a blonde that looks like her -- getting launched in a Porta-Potty slingshot. Hey, she's a mom; like she tells Knoxville in the bit, "I'm not scared of poo-poo. Let's do it."

As for the other sketch, Spears — now cleaned off from her time in the potty-launcher — hangs out with Jimmy Kimmel comparing tattoos.

Watch the clips here