Knock on wood (Amii Stewart)
| Date | 3/2/79 | 3/9/79 | 3/16/79 | 3/23/79 | 3/30/79 | 4/6/79 | 4/13/79 | 4/20/79 | 4/27/79 | 5/4/79 | 5/11/79 | 5/18/79 | 5/25/79 |
| Pos | 28 | 21 | 13 | 8 | 4 | 4 | 3 | 3 | 7 | 12 | 13 | 23 | 29 |
R&R CHR/Pop charts and/or Mediabase Mainstream top 40 charts. (c) Radio & Records, Inc.. Used with permission from both R&R and Mediabase.