(Bob McDill - Paul Harrison)       One minute she's up, one minute she's down   Lovin' her's like bein' on a merry-go-round   Sometimes she's sad, and sometimes she's funny   Sometimes I wonder if I'm going or coming.      I know she's not easy   To understand   But lovin' her makes me   Do the best that I can.      Chorus:   She's a heart full, unpredictable   Can't explain the things she does   She's a heart full, but she's worth the trouble   'Cause she's got a heart full of love.      --- Instrumental ---      First the sun shines then the rain falls    Sometimes she cries for no reason at all    Then she's a child, restless and moody    Sometimes she looks at me, sometimes she looks through me.      There's things about her   I've never understood   But I wouldn't change her   Even if I could.      Chorus:   She's a heart full, unpredictable   Can't explain the things she does   She's a heart full, but she's worth the trouble   'Cause she's got a heart full of love.      --- Instrumental ---      She's got a heart full of love...