(Stand In The Rain it is! BTW, I just noticed some of these ponies are Alicorns, but only Ice Celestia is royalty.)
Light Treasure put on a fake smile. "We'll all be singing equal parts of the song, actually." She put on a real smile. "I would like you to meet the rest of the club! This is Feather Blush! She writes the songs for us!" Light Treasure pointed to a pretty, shy-looking alicorn in the corner, scrambling about with papers for the piano music.
"And Honey Mane..." She pointed to a brown earth-pony who waved with a friendly smile.
"And Lightning Flicker..." She pointed to a VERY small, odd-looking alicorn, adjusting the lights on the ceiling.
"And that's... We're not sure, but the principle said we have to let her join." She pointed to a kind of ugly blue alicorn with creepy pink snake eyes, giving directions to some lost ponies at the doorway.
"And over there is one of my best friends, Princess Ice Celestia. She doesn't like to be treated like a princess, so don't bother." She pointed to a pretty white alicorn with blue spots and pretty gold things on her legs, who was quietly practicing on the stage.
"That's Star Sparkle! I think you've seen her at tryouts." She pointed to the light brown farmer-pony.
"And that's Steel Masquerade, he only sings when he has to, and he's in charge of some of the guitar music." She pointed to an attractive brown stallion who was showing some other stallion how to properly use a drumstick.
"We'll all be singing Stand In The Rain, written by Feather Blush herself."