The songstress relaxed in a cool midi dress while in LA yesterday (26 September), which was covered in graffiti print and hugged her figure.
She also ditched her footwear and went barefoot, as she lounged on a sofa and struck a pose for the camera.
Rita, 22, uploaded a couple of snaps in her Material Girl outfit and wrote: "Chillin in my @materialgirl attire of course!"
The chart-topping singer was named as the new face of the teenage fashion label back in June, in a deal that was reportedly worth £500,000.
She was elated with the news and described Pop Queen Madge as her "muse" and style "icon".
But Rita hasn't been sporting Material Girl on every day of her LA trip, as she was caught wearing a bizarre menswear inspired ensemble on Tuesday (24 September).
We much prefer it when she's wearing edgy, yet feminine wardrobe items like this midi frock.
What do you think of the Material Girl dress? Let us know below.