India, Jan. 27 -- Jennifer Lopez proved she's still the queen of the dance floor during a surprise performance at TAO Park City on Saturday night, electrifying clubgoers at the Sundance Film Festival. A source revealed to Page Six that the multi-talented star had the crowd "buzzing" as she effortlessly commanded the stage. The singer's performance served as a reminder to everyone of why she continues to be the star icon that she is.

The source told the media outlet, "She arrived in good spirits and went straight to her table where she danced and sang for the first part of the night." The DJ at the party reportedly spotted the singer in teh crowd and "started engaging with her" as he played her hit song Jenny From The Block.

The insider ...