I'm yellow and long .I grow on the three .My name begins with the same letter as in "b".What am I？

banana香蕉

酷玩的“ Yellow ”？

Look at the stars; look how they shine for you

And everything you do

Yeah, they were all yellow

I came along; I wrote a song for you

And all the things you do

And it was called yellow

So then I took my turn

Oh what a thing to have done

And it was all yellow

Your skin, oh yeah your skin and bones

Turn into something beautiful

D'you know?

You know I love you so

You know I love you so

I swam across; I jumped across for you

Oh what a thing to do

'Cos you were all yellow

I drew a line; I drew a line for you

Oh what a thing to do

And it was all yellow

香蕉

I grow on the three...汗一个

I grow on the four =.=