Victoria's Secret Fashion Show 2012: Justin Bieber Serenades, Rihanna Struts

Bruno Mars also performed on the scantily clad catwalk.

No performer is better suited for rocking the crowd at Victoria's Secret's annual celebration of eye-catching, barely there fashions than the unapologetically sexy Rihanna.

Eight minutes into the broadcast, the Bajan bombshell, clad in a black strapless dress accentuated by a garter belt and pearl sunglasses, set the tone for the show, performing her breakout hit "Diamonds," from her #1-debuting album Unapologetic. While the "Loveeeeeee Song" chanteuse stalked the stage, a parade of scantily clad supermodels strutted down the runway, in the latest and sexiest VS lingerie.

Bruno Mars kept things simple, performing "Locked Out of Heaven" and "Young Girls," respectively, from his upcoming album Unorthodox Jukebox (out December 11). Backed by a six-man band, the Hawaiian-born singer/songwriter belted his throwback tune while models sashayed down the catwalk in classic-cinema-themed lingerie.

No models came out during Justin Bieber's performance of "As Long as You Love Me," from his third studio album Believe. But after a quick commercial break, which featured a behind-the-scenes look at the production, most of the models, including Adriana Lima and Candice Swanepoel, succumbed to Bieber Fever, dancing backstage to the Biebs' "Beauty and the Beat" before coming out in VS' youthful and popular Pink line.

Check out these photos of Bieber, Rihanna and all the Angels strutting their stuff!

In typical Bieber fashion, the pop sensation — who is currently touring nationwide for his Believe Tour — preened and serenaded models as they passed while dancing in his all-white, futuristic sleeveless vest and silver cutout gloves.

Back when the show was originally taped last month, Bieber made headlines as rumors swirled that he became romantically involved with model Barbara Palvin. There were no signs, however, of the romance that allegedly led to his short-lived breakup with Selena Gomez.

Justin Bieber and Selena Gomez fans are all for the couple's reunion!

Before the final curtain call, when all the models rush the stage still in their last change of VS unmentionables, Rih Rih unleashed her inner fashion model, ripping the runway in her pink lace camisole while serving up her encore performance of "Phresh Out the Runway."

Themes for the extravaganza included "Circus," "Dangerous Liasons," "Happy New Year" and "Silver Screen Angels." Models wore ensembles that ranged from the whimsical to floral, including those that were highlighted by the signature VS wings. Unlike last year, there was no $2.5 million mermaid-inspired bra.