Ray Charles and other celebrities sing the alphabet song for you in "Sesame Street". Practise singing along.

A B C D E F G
H I J K
L M N O P
Q R S
T U V
W X
Y and Z
Now I said my ABC, won't you sing along with me?

A B C D E F G
H I J K
L M N O P
Q R S
T U V
W X
Y and Z
Now I know my ABCs
Next time, won't you sing with me?

A B C D E F G
H I J K
L M N O P

(I'm rapping)

Q R S
T U V
W X
Y and Z
Now I said my ABC, won't you sing along with me?

There are two differences between British and American pronunciation of the letters of the alphabet:

R In British English there's no sound /r/ in the pronunciation of the letter R !, only the vowel (it sounds like "aah").
Z In AmE they say "zee" /zi:/ and in BrE we say "zed" /zed/