BET has confirmed Beyonce to perform and is expected to officially announce Mary J. Blige and Trey Songz as musical guests sometime soon. The performer line-up of 2011 BET Awards is getting longer. After booking Alicia Keys, Chris Brown, Jill Scott, Drake and Lil Wayne, the organizers secured Beyonce Knowles as another official musical guest of the prize-giving event. Expected to sing her second single “Best Thing I Never Had”, Beyonce receives one coveted nomination this year. The “Run the World (Girls)” singer is vying for Best Female R&B Artist, going head-to-head with the likes of Marsha Ambrosius, Keri Hilson, Jennifer Hudson and Rihanna. In addition to Beyonce, BET reportedly has also tapped Mary J. Blige, Trey Songz and Kelly Rowland to make a live performance.