OK THE SONG STARTS OFF ON Eb, BUT AT THE END OF THE VERSE IT'S END'S ON Db. BUT THE SONG ENDS IN Bb. , CAUSE I NORMALY TRY TO LISTEN TO THE 251 AND THAT'S HOW I FIND THE KEY IT'S IN AND IT ENDS ON Db. I KNOW IT MODULATES FROM THE ORIGINAL KEY TO Bb. JUST CONFUSED ABOUT THE THE Eb AND Db