The 2011 Billboard Music Awards are underway live from the MGM Grand Garden Arena in Las Vegas. The much talked about highlight just happened as Beyoncé gave quite an unforgettable performance. Her set began with a video intro of The First Lady Michelle Obama, her parents Matthew & Tina Knowles, sister Solange, The-Dream, Babyface, Barbra Streisand, Bono and more giving praises for B’ and the accomplishments she’s received in her stellar career. That lead into a performance of her new single “Run The World (Girls)”, ending off with Tina Knowles and nephew Daniel Julez presenting Beyoncé with Billboard’s prestigious Millennium Award. Watch the full performance above and stay tuned here as we’ll update with more highlights from the show as it goes on..

Props to Yardie/MWP

Catch the opening performance from Rihanna & Britney Spears, Mary J. Blige & Lil’ Wayne, Nicki Minaj & Britney Spears, Black Eyed Peas, Cee-Lo Green, One Republic, The Far East Movement feat. Snoop Dogg, after the jump….

To open up the event Rihanna and special guest Britney Spears went all out with whips, chains, leather and stripper poles to perform the “S&M (Remix)”.

The Black Eyed Peas perform “Just Can’t Get Enough” & “I Gotta Feeling”

Cee-Lo Green performs a medley of his latest hits.

Mary J. Blige takes it back to her My Life days performing her new single “Someone To Love Me (Naked)” with Lil’ Wayne. The song which originally appeared on Diddy-Dirty Money’s Last Train To Paris is the lead single off her My Life II: The Journey Continues LP.

For the group segmenr of the show, One Republic & The Far East Movement with help from Snoop Dogg perform their latest hits on the Billboard stage.

Nicki Minaj leads her set off with her latest single “Super Bass” and gets Britney Spears to join her on stage for the “Till The World Ends (Remix)”. Where was Ke$ha?