Daytime Emmy Awards 2013 -- MAJOR SCREWUP ... Envelope Mix-Up During Live Show

Someone's probably getting FIRED at the Daytime Emmys this morning ... because when Aisha Tyler went on stage to present her award, someone gave her the WRONG ENVELOPE!!!

Aisha's reaction when she opens the envelope is priceless -- because she quickly realizes the name printed inside wasn't even nominated in the Best Talk Show category.

What ensues is pure live TV gold ... with Aisha vamping like a pro while the producers scrambled to get her the correct envelope.

Ya gotta watch the clip.