Aretha Franklin. Whitney Houston. Christina Aguilera. Over the years, Mercedes (Amber Riley) has covered many of music's most powerful and acclaimed singers on Glee. But for one of her final performances on the Fox musical comedy, the McKinley High alum will take on one of the most well-known vocalists on the planet: Diana Ross.

In this exclusive first listen from Friday's two-hour finale (8/7c, Fox), Mercedes delivers a powerhouse rendition of Ross' 1961 hit "Someday We'll Be Together."

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It's yet another triumphant performance by one of New Directions' most impressive singers. But it also tugs at the heartstrings since this is one of the last times fans will get to hear Mercedes belt it out as she does best.

Are you ready to feel all the feels? Take a listen below:

Glee's series finale airs Friday at 8/7c on Fox. Are you ready to say goodbye? What other songs do you want to hear in the finale?