No one can resist getting down on the dance floor when Bell Biv Devoe starts performing "Poison" -- not even Mary J. Blige and Toni Braxton!
It all went down at a birthday party last night for Toni's brother-in-law, music producer Vincent Herbert. In addition to working with Mary J and Toni, Vincent has also worked with Lady Gaga ... who we're told was also in attendance.
Those girls are poison.
Mary J. Blige and Toni Braxton
Rocking Out to Bell Biv Devoe
1/28/2012 4:00 PM PST BY TMZ STAFF
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