Simplify the following text for a Grade 7 native English-speaking person.
Original: Kelly 's Top 40 singles include `` Billy Baxter '' , `` Before Too Long '' , `` Darling It Hurts '' , `` To Her Door '' ( highest charting local hit in 1987 ) , `` Dumb Things '' ( appeared on United States charts in 1988 ) and `` Roll on Summer '' .
Simplified: Kelly 's Top 40 singles on the National charts were his 1980s songs `` Billy Baxter '' , `` Before Too Long '' , `` Darling it Hurts '' , `` To Her Door '' , `` Dumb Things '' , and his 2000 single `` Roll on Summer '' . `` To Her Door '' , written by Kelly , was his best local hit .