Songs that sound like other songs

For years now I’ve noticed some songs/musical numbers sound somewhat to very similar to other musical numbers from elsewhere in the show. More recently after the EqG movies came out I started noticing FiM’s songs occasionally using EqG’s sound, and vice-versa. But some sound-alike songs occur just within the show or the movies.
 
Here are the ones I think sound alike:
 
Make A Wish - This is Our Big Night  
Ballad of the Crystal Ponies - Winter Wrap-Up (okay I know this one’s stretching things a bit)  
I’ll Fly - My Past is Not Today  
You’ll Play Your Part - I’ve Got to Find a Way  
Let the Rainbow Remind You - Shake Your Tail (suggested to me by someone else)  
What More is Out There? - This Strange World  
Unleash the Magic - Stop the Bats
 
Anyone else got some?