"I'm crazy, and I don't pretend to be anything else," Rihanna tweeted earlier today (April 18). Well at least she's honest! The Coachella attendee has been snapped partying hard at the music festival all week, and the latest images to hit the web are rather incriminating, AOL Music reports.

As you can see from our "puff, puff, pass" montage above, RiRi was shot smoking what many believe to be marijuana while straddling her bodyguard during a Coachella concert. In the latest images, Ri is pictured scooping a mountain of unidentified substance from the man's head onto a brown piece of paper.

Some sites describe the substance in question as "white powder," which could be cocaine, or any variety or crushed pills, while others speculate it's a pile of weed atop the bald man's head. We're going with the latter interpretation. It certainly wouldn't be the first time the singer has been snapped by the paparazzi while getting down on the green.

What do you think Rihanna is doing in this photo? Tweet us your theory @theboombox and check out more photos from Coachella 2012 in our gallery below!

See Photos of Rihanna Performing at Coachella 2012