From My Little Pony 'n Friends S1E25 "Sweet Stuff and the Treasure Hunt".
Lyrics:
Don't be upset, if you're not like folks you've met
Be glad you are who you are
No need to frown, don't go putting yourself down
Be glad you are who you are

Don't think you're weird, cause no one else is like you
It doesn't mean you won't go far
Everyone is special, everyone a star
Be glad you are who you are

Why get depressed cause you're different from the rest
Be glad you are who you are
No need to pout or to feel like we're left out
Be glad you are who you are

Don't think you're weird, cause no one else is like you
It doesn't mean you won't go far
Each of us is special, each of us a star
Be glad you are, we're glad we are

We're glad we are what we are