I always liked Melanie's old "Roller Skates" song, I used to sing it back in the 60's! Sheesh, was she cute or what?:
It's a great song for biking to. I used to LIVE on my roller skates back then, so I always felt it was a personal theme song for me....
http://www.youtube.com/watch?v=MS06L87FVns

here's the lyrics:
I rode my bicycle past your window last night
I roller skated to your door at daylight
It almost seems like you're avoiding me
I'm okay alone, but you got something I need

Well, I got a brand new pair of roller skates
You got a brand new key
I think that we should get together and try them out you see
I been looking around awhile
You got something for me
Oh! I got a brand new pair of roller skates
You got a brand new key

I ride my bike, I roller skate, don't drive no car
Don't go too fast, but I go pretty far
For somebody who don't drive
I been all around the world
Some people say, I done all right for a girl

Well, I got a brand new pair of roller skates
You got a brand new key
I think that we should get together and try them out you see
I been looking around awhile
You got something for me
Oh! I got a brand new pair of roller skates
You got a brand new key

I asked your mother if you were at home
She said, yes .. but you weren't alone
Oh, sometimes I think that you're avoiding me
I'm okay alone, but you've got something I need

Well, I got a brand new pair of roller skates
You got a brand new key
I think that we should get together and try them out to see
La la la la la la la la, la la la la la la
Oh! I got a brand new pair of roller skates
You got a brand new key