I was down on myself both day and night
I couldn't get a thing to go just right
I was hangin by my thumbs and slippin' on my feet
I had to take a break I couldn't stand the heat

Just when I thought I could never win
I was doing pretty good for the shape I'm in

I went to the movies last night again
I couldn't stay long enough to see the end
But there was something going on that I couldn't see
Everybody's making out on the balcony

I was missing out on the fun again
But I'm doing pretty good for the shape I'm in

I tried so hard to get back in the race
I'd be satisfied if I could place
There's so much competition but the best don't always win
I'm doing pretty good for the shape I'm in

I went to a party and made a few passes
One was a dream and the other was nasty
I guess you know by now that I did it again
But I was doing pretty good for the shape I'm in

I was down like a dollar coming up against a yen
I was doing pretty good for the shape I'm in

Doing pretty good for the shape I'm in...

Arc Angels - Shape I'm In

http://www.lyricstime.com/arc-angels-shape-i-m-in-lyrics.html

For future reference, just Google the most common line in the song, and 9/10 will get you what you need to know.