Here's one based on "Feeling Pinkie Keen". I won't tell you the original because it's really obvious.
Pinkie Sense
Very superstitious, Pinkie's twitching tail,
Very superstitious, anvil falls like hail,
Feels it in her shoulder, Gummy in the tub,
Twilight on the soapbox, you couldn't make this up
When you believe in things that you don't understand,
Then you suffer,
Superstition ain't the way
Very superstitious, ear-flop and knee-twitch,
Swarm of bees is coming, her nose has an itch,
Almost like a daydream, it's all going wrong,
Twilight won't believe it, but not for long
When you believe in things that you don't understand,
Then you suffer,
Superstition ain't the way
Very superstitious, nothing more to say,
Very superstitious, the doozy's on its way,
Fended off the hydra, Twilight Sparkle burns,
Still, she now accepts that, Pinkie Sense confirmed
When you believe in things that you don't understand,
Then you suffer,
Superstition ain't the way