The 19 Most Epic Glee Performances of All Time

Glee's duets episode (episode four of season two) was a fan favorite, mostly because we got to see our favorite characters team up and build off each other. Just like Sam and Quinn stole our hearts with "Lucky," Mercedes and Santana proved they were a force to be reckoned with. This was the second duet from the ladies in Glee's history — most likely a result of their first performance of "The Boy Is Mine."