How do I make animations in which the character is singing or talking?
What exactly is the problem you’re having?
Quick tips:
Don’t animate to the letters that make up the words that a character is saying. When people talk, our mouth generally slurs words and mouthshapes into eachother, so we make these really general mouth shapes that don’t correspond to the spelling of a word.
When making big vowel sounds (like in the word loud, or cat) don’t forget to drop the jaw down. On hard consonant sounds, remember to squash the face. Look in the mirror and look at the way your face changes when saying different sounds.
To get a more realistic look to your animation, do the lip sync last. Animate body gestures first. Once that looks good, concentrate on facial expression, then move on to the lip sync.
http://minyos.its.rmit.edu.au/aim/a_notes/anim_lipsync.html
http://www.albinoblacksheep.com/tutorial/lipsync
Let me know if you need more help.