Zee Deveel

Ok so the "Oh" before the "Be" is actually higher and I could sustain that much better. Is it to do with the E vowel sound?

Hi all - So this is just a clip of me singing a few parts of Little Black Submarines by the Black Keys. I've been practising my singing for a long time but I want to take it seriously now and kick on to being a confident singer who can perform. I'm especially concerned about the strain on higher notes like "b-eeee" at 25 seconds in and what I can do about that. Though if you can diagnose any other issues I'd obviously love to hear! Thanks a bunch! http://www.youtube.com/watch?v=u2fGMiJ6idk