Was Beyonce Acting Like A BIATCH At The 2012 BET Awards?

Despite Beyonce warmly greeting Kim Kardashian with kisses on the cheek (click Pink for more), sources say it was all a front...

Insiders add, Bey gave Kimmy the cold shoulder at the 2012 BET awards while the 'power couples' sat front row for the show. 

Bey insisted to sit on the OPPOSITE side of Kim, ignoring her and was caught at times glaring at her (see pic above). Bey opted to chit chat with her sister Solange and got up numerous times with her sissy to dance to their favorite songs, they didn't look Kimmy's way to join. 

If having to endure Kim throughout the awards wasn't bad enough, Bey became enraged when Mindless Behavior dissed Lauryn Hill over her tax problems...

Comedian Mike Epps and the group Mindless Behavior were co-presenting the award for Best R&B Artist when Mike jokingly tried to sing.

One of the members of the group quipped, "You sing BAD ... like Lauryn Hill's tax accountant bad."

The diss drew gasps from the crowd ... and pissed off Beyonce, who ultimately WON the award that was being presented.

B was so upset, she scrapped the speech she had prepared and defended Lauryn's honor instead ... saying, "I want to thank all the talented R&B women that came before me like Lauryn Hill and Mary J. Blige."

When B walked off stage, there was a woman waiting for her -- possibly a BET handler -- and B began to vent about the insult, saying the Lauryn Hill diss was "disrespectful" and "not cool."

The woman complimented Beyonce for adding Lauryn Hill's name to her acceptance speech ... to which Beyonce replied, "I just felt [the diss] was wrong."

What do you think is up with Bey? Overreacting or was she justified?

Source