Check out this video clip of the Beyoncé Experience Tour at the Staples Center in Los Angeles on September 2nd. Kelly Rowland and Michelle Williams joined Beyoncé on stage to finish a song with her. Towards the end of the show, the ladies also led the crowd in singing “Happy Birthday” to Beyoncé, who turns 26 years old today. Also in attendance was her longtime boyriend , Jay-Z, who joined her onstage during the “Upgrade U” performance. The former DC3 crew and Jay-Z showed up for a special filming for Beyoncé’s live DVD. So be on the look out for that.