Happy Monthiversary

This song is sung by Pinkie Pie to the Cakes' baby twins near the beginning of Baby Cakes, celebrating a month since their birth.

Lyrics

 * Happy monthiversary to you and you today
 * [very quickly] I can't believe you're already a month old time sure flies doesn't it well it seems like only yesterday you were born.
 * But now you're a month old today, hey!