We knew there had to be some serious shenanigans going on in there!
Luckily we have an exclusive peek at her hijinks!
And did we mention she rode a mechanical bull dick???
Ch-ch-check out the rest of her festivities (above)!
[Image via AKM-GSI.]
OMG OF COURSE!!
We've seen the pics of Robberz and the curious blonde, and even though they're super grainy, it's gotta be Sienna. We're 99.9% sure.
Why?? Because as we discussed earlier in the week, the two were definitely seen together at the Electric Room last weekend, which is the same place Rob was photographed with this supposed mystery woman.
And as we're sure all of you diehard R-Patz fans know, Sienna is Tom Sturridge's baby mama!! So no, we don't think he's cheating on Kristen Stewart with his best friend's gal. He knows better than that!!
[Image via Ivan Nikolov/WENN.]