Rarity’s already proven to be rockstar material.

On a double-neck guitar, one advantage is being able to switch from a 12-string sound to the 6-string sound without switching guitars. If needed, you can also switch between two different tunings as well.

Dude!  
You are freaking psychic!

interestingly, Rainbow Rocks seems to confirm that Pinkie is destined to be the Mane 6 drummer, following a pattern established by wild and crazy Animal or overly energetic Ritsu.

@SeraphimDawn  
“Do those even exist?”  
Yes.  
http://www2.gibson.com/Products/Electric-Guitars/SG/Gibson-Custom/EDS-1275-Double-Neck.aspx  
They come in all shapes and sizes.  
http://www.guitarrez.com/inventory/ibanezinventory/ibzxpt1400tw.html
 
http://www.bcrich.com/models/guitars/Bich/Bich-Double-Neck/117
 
http://www.deanguitars.com/dean_winter_08/USADaveMustaineDoubleNeck.htm

Oddly enough, I imagine Pinkie would prefer to play the banjo… xD

@evil_eric  
There may be a reason for that.

It seems like in these pony rock band images, Pinkie is always the one playing the drums.

@AKShamu28  
I didn’t know that you were supposed to eat your first born…

I dont care what the rest of you say but Fluttershy is holding a baseball bat like it’s her firstborn child.

@Comisdazied  
I wonder who the Electric Organist is.

Too many guitarists.

Twilight Sparkle becoming Claudio Sanchez of Coheed and Cambria

@Deadpan  
And thank you, also.
 
…Maybe should check source…

When could we see a pony with a Balalaika?  

@Scrounge  
Hard to say, but it kind of looks like a didgeridoo.

@SeraphimDawn  
Thanks.

I never got the point of those double guitars I keep seeing in art. Do those even exist?
 
I see Rarity has a taste in Oriental instruments. Sanxian.
 
I believe what Fluttershy is playing is a Shakuhachi

What’s Fluttershy playing?

Fluttershy is too calm, there must not be an audience.
 
Or the audience is all animals.

So many memes in the comments…
 
Also, this turned out great, Temp.

Add an accordion player and you have Flogging Molly’s setup.

@PonyPon  
Twilight:who want to hear a funny story at camp wanaweeb?It was the night of the tuna melt jamboreegets hit by a computer monitor  
Dr.Hax:HHAAAAAAXXXXSSSS!!!

We need Metal in the show.

AND NOW FLUTTERSHY ON THE ELECTRIC TRIANGLE WITH A KICK ASS SOLO