My two cents on Filli Vanilli or what I had learned from the Fluttershy/Pinkie conversation.

After watching this eposide like a couple of times where what I can gather from it. Yes this is my first two cents review.

The singing is Awesome, especially Fluttershy's voice and Big Mac's as well. They should sing more often. Fluttershy jamming and shaking to the music was cute.

Ah yes, the return of Flutterguy to fill in for Big Mac, after he uses his voice in a turkey call, thanks to Pinkie.

Rarity: What if Big Mac was onstage, moving his lips while you're behind the curtains singing his part? It would be just like singing in your house! Nopony would know it was you! That's also know as lip-singing.

I understand that some out there gotten stage fight but wow, those floating white heads that Fluttershy sees explains it all. She really thinks everypony is laughing at her but on the contrary people are cheering for her. I can image stage flight is not easy to get over and it takes some times. It appears that Fluttershy has one problem after another.

Okay, as for Pinkie Pie's behavior, chances are in her own logic, she was actaully trying to help Fluttershy getting over her fears and point out how silly stage flight was. However, its not what Pinkie did, is how she did it and went by it which paints her off as acting like a schmuck to many people. (I'm thinking, Pinkie may be reduced to "background pony" status by the bronies at this point).

Pinkie Pie: That was totally unbelievable! I mean, the curtain came up and there you were, singing in front of everypony! And you know, I don't think anypony was jealous, 'cause there certainly wasn't an angry mob! But it must have been horrible standing there on stage, all eyes glued directly on you! It's like you were living your own personal worst nightmare! Okay, Pinkie did had a point, but did she really have to come up with this over the top whatever she was doing in the beginning of the episode.

Pinkie Pie: Though, no offense... you kinda sounded like a dude. Thank you Captain Obvious.

Here's what I learned from all of this, make Fluttershy cry and you will get the book thrown at you. While Fluttershy IMO has shown some improvement, she has a long way to go... She really needs to show more development and improvement.