Rihanna and her friends backstage at "Saturday Night Live." (Photo : Twitter: @Mforde11)

Rihanna poses for her best friend Melissa Forde, backstage at "SNL." (Photo : Twitter: @MForde11)

Rihanna is officially an 'SNL' celebrity guest favorite; the superstar was invited to the show for the fourth time. Although she didn't participate in any of the sketches, Rihanna still made her presence known with her amazing 2-song performance and her sexy street-style fashion.

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For her first performance, Rihanna sang her current hit single "Diamonds." The singer must have been channeling the style of her "big brother" Shawn "Jay-Z" Carter because she was wearing a classic pair of Timberlands - a staple item in Mr. Carter's wardrobe. The funky pop star sported an all-camouflage outfit: a skimpy short camouflage dress and an oversized camouflage jacket. The singer is still rocking her slick sides-wept and half-shaven hairdo and wore her signature red lipstick. The camo-clad diva performed her popular song in front of a trippy psychedelic background. Many Twitter users dubbed the background a "Windows 98 screensaver," which we have to admit was a valid observation.

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For her last set, Rihanna introduced "Stay," a new song from her upcoming album "Unapologetic." While we were fixed on the obvious Chris Brown-related lyrics, we were also focused on her sexy Bob Marley dress. The Bajan pop star paid homage to the legendary reggae artist in the best way she knew how - fashion. The dress was wrapped and tied to the side, creating a sexy high slit. For the sultry ballad, Rihanna ditched the construction boots and wore black strappy sandals.

Watch her "Diamonds" performance below and her first-ever "Stay" performance here.