Rihanna had a little fun at Justin Bieber's expense yesterday by putting a mask on her photographer up sitting her on a toilet.
 
Snapper Jen Rosales put on a Bieber mask and posed as Rihanna planted a kiss on her cheek. Rosales then took a seat in a restroom stall, still wearing the life-like mask, for another quirky photo.
 
Rihanna tweeted the snapshots on Tuesday, writing, "Me and the beebs yesterday! Shoutout to my photographer @jennnrosales."