The smokin' hot live performances and innovative fashion from the 2012 Victoria's Secret Fashion Show taped last month finally aired last night (Dec. 4) on CBS, giving viewers a chance to see three of pop music's biggest stars as Rihanna, Bruno Mars and Justin Bieber performed their latest hits for the trendy audience.

RiRi looked ready for the runway herself in a black ball gown as she sang her current No. 1 hit 'Diamonds' on a foggy stage while models with butterfly wings strutted past. And she wasn't going to pass up the chance to perform 'Phresh Off the Runway,' an aggressive, hip-hop-influenced song tailor-made for fashion shows with its lyrics about expensive jewelry and glamor.

Mars and his band got the raised the energy level in the room with their new smash 'Locked Out of Heaven,' then slowed down the tempo for the ballad 'Young Girls.'

Bieber went the acoustic route for his first performance. Dressed in the white sleeveless jacket he often wears on stage, Bieber sat on a stool for a mellow rendition of 'As Long As You Love Me,' showing off his vocals and rap-singing the verse normally performed by Big Sean.

Bieber and his guitarist had the stage to themselves for that song, but on 'Beauty and a Beat,' he sang and danced alongside the half-naked models. We hope Selena Gomez wasn't watching! Remember, this is the fashion show where the Biebs allegedly flirted with several models while he was on the outs with his girlfriend.

Check out all the musical highlights from the show.

Watch Rihanna Perform 'Phresh Off the Runway'

Watch Bruno Mars Perform 'Locked Out of Heaven'

Watch Bruno Mars Perform 'Young Girls'

Watch Justin Bieber Perform 'As Long As You Love Me'

Watch Justin Bieber Perform 'Beauty and a Beat'