A source close to the situation explained:
Jonathan Groff and Jeremy Jordan may both be on hit musical TV shows, but onstage they're ready to duke it out!
In Marilyn Monroe wigs??
Ch-ch-check out the video (above) to see Glee/Smash mashup of Let Me Be Your Star!
This is super ADORBz! But next time you guys you want to battle it out on stage, may we suggest The Confrontation?