Verse 1 Rule number [Am] [F]one Is that you [G]gotta have [Am] [F]fun But baby [G]when you're [Am]done [F] You [G]gotta be the first to [Am] [F] [G]run Rule number [Am] [F]two Just don't get [G]attached [Am]to [F] Somebody [G]you could [Am] [F]lose So [G]le-let me tell [Am] [F] [G]you Chorus This is how to be a [Am] [F]heartbreaker Boys they...