Well, first of all, I'll make it clear: I did this poll as "Glee does...: which one is your favorite?", and with the "does" it is not necesary a singing performance...

01. "Single ladies" (It was not actually sang it, but it was an important song during the whole episode "Preggers", which in my opinion, it was one of the bests, and so far, it is the only song heard more than once in the same episode -"You're the one that I want" was performed twice, but in two different episodes, "Audition" and "Hairography"-) So, I don't want hear (actually read... ^_^) yours "Hey, 'Single ladies' was never sang it", "Hey, 'Single ladies' was never performed as a song", "Hey, I can't find my pajamas!!!" (O_O)

02. "Halo/Walking on sunshine" is a mash-up (just in case if u don't know... this show never mentioned what it is... ^_^), so, part of the credits go to Katrina & the Waves for their "Walking on sunshine".

03. "Bootylicious" is actually a Destiny's Child's song, but Beyoncé was in the group.

04. "Hair/Crazy in love" is a mash-up as "Halo/Walking on sunshine", so the 50% ("Hair") is from the musical "Hair".

05. "Telephone" is a Lady Gaga song, with the featuring of Beyoncé.

So, kind it that Beyoncé was always there, but they never performed one of her songs without mash-ups, collaboration, etc, etc., etc... Basically, she was there, in an omnipresent way (Is God an evil dwarf?). *_*

P.S.: I love B'...

This was defo the best one the Glee performed!