The on-screen scandals at McKinley High are no match for the real-life romance drama that has pitted costars Chord Overstreet and Darren Criss against each other in fight for the affections of actress Emma Roberts.

A source spotted Emma, 20, who's been dating Chord, 22, on and off for months, getting close to Darren at Fox Animation's Electric Christmas, hosted by Paris Hilton, in L.A. on Dec. 7.

"Darren couldn't stay long, but he made sure to get in time with Emma," the eyewitness tells Star. "She looked thrilled to see him."