Beyonce's First 2011 Performance!

Superstar Beyonce kicked off 2011 with a stellar performance at the grand opening of the Las Vegas' resort "The Cosmopolitan" on Friday. Watch in the video above the R&B-pop diva SINGING her hit "Halo" - with Chris Martin (of Coldplay) playing the piano. Beyonce's hubby Jay-Z was also a performer at this event. He and B' joined forces on stage to perform the rapper's Blueprint 3's song "Young Forever". Later on Jay-Z and Chris Martin helped Kanye West - another musical guest - perform his 2008 single "Homecoming". Enjoy.