There are several different songs called NOBODY'S PERFECT. The one the Bellamy Brothers recorded was written by Bernd Meinunger, John O'Flynn, and Ralph Seigel. It is on 2 of their albums: "Let Your Love Flow," Intersound 2-CD #1105, 1994; and "Nobody's Perfect," Jupiter CD #07402, 1994.

This is what I was able to transcribe from a sound sample at allmusic:

...Nobody's perfect. That's all I can say.
So let's shake hands. Let's stay friends. Hey, that's OK.
When I was a kid, tell you what I did: I was surely bad as hell.
Said the man in the bar, "He traveled far. What a story he had to tell."
Well, I gotta confess, I broke lots of glass, and I broke some girls' hearts, too. (?)...