Vivica A. Fox appeared on BET earlier this evening offering her take on some of the celebrity red carpet looks during the 2010 BET Awards.

The confirmed cougar wasn?t very flattering when it came to her assessment of Monica?s avant garde ensemble and Mo responded to the perceived insult by politely, slamming Vivica?s age and fashion sense.

You betta tell her Mo! SandraRose has reached out to Vivica for a response and I’m sure it’s gonna be a good one. All I know is… Vivica better choose her words very carefully. We all know Mo don’t play dat!

In lighter news, Monica hit the BET awards stage with Denise Williams last night to perform an “Everything to me”/’Silly” compilation.? The two were also spotted backstage where Denise stated that Mo is the ONLY singer who she feels could carry the legendary tune:

Video ~ Monica & Denise Williams Backstage (BET Awards)

I was crying everytime I heard everybody elses version [of Silly]. I prayed to God to please send somebody else that can SING. God answered my prayer and sent Monica to sing my song. I thank God for her and I’m honored and so proud to be a part of her coming back. She’s a true star. ~ Denise Williams

Check out footage of the two onstage performing their hits below:

Video ~ Monica & Denise Williams (BET Awards)

Photos: Wireimage/FreddyO