Watch a clip of the spectacular reunion below, via TMZ.
Speculation about a possible Destiny's Child reunion started Friday evening when Williams -- who was up for several Stellar awards this year -- tweeted the hashtags #SayYes, #Beyonce and #KellyRowland.
The Stellar Awards is scheduled to air April 5 on TV One.
Saturday's performance marked the group's first live appearance since Beyonce's Super Bowl halftime show in 2013.
But don't get your hopes up for a reunion tour. A rep for Beyonce recently told Billboard that rumors about a Destiny's Child tour are "completely false."
"There is absolutely no tour," the rep notes.