Beyonce Knowles

Watch Beyonce announcing pregnacy last night at MTV VMAs 2011

Watch Beyonce announcing pregnacy last night at MTV VMAs 2011The 28th annual MTV Video Music Awards featured live performances by the likes of Lil Wayne, Chris Brown, Beyonce Knowles and Lady GaGa. The winners were announced by such presenters as Kim Kardashian, Selena Gomez, Taylor Lautner, Chord Overstreet and Jared Leto.

Only a short time after it was revealed that Beyonce and her hubby Jay-Z are pregnant with their first child, the singing sensation took the stage of the 2011 MTV Video Music Awards to perform her upbeat ditty 'Love On Top.'

Introduced by pop superstars Lady GaGa and Britney Spears, Bey took the stage with some back-dancers, dressed in sparkly lounge-singer suit.

After finishing the last lines, Beyonce surprised the audience by throwing the microphone and show off her baby-belly while her husband was smiling thrilled from the audience being congratulated by fellow Kanye West. Congrats to the happy couple!

2011 MTV Video Music Awards - Beyonce's performance 'Love On Top':

The pop sensation, Justin Bieber won his first Moonman trophy that evening by snatching Best Male Video for his "U Smile" clip. The award was presented by newlywed Kim Kardashian.

After he kissed Selena, Justin grabbed the trophy and thanked: "I just wanna thank you so much, not only Lady Gaga but Jesus, because you know, i-i wouldn't be here without him, he's really blessed me, and put me in this position. I wanna say thank you so much." He also thanked to the others nominees for the Best Male Video as Eminem, Cee-Lo Green, Bruno Mars and Kanye West, saying that he is a true fan of them and that they were so great.