| smile it's contagious | 0.64 | 0.4 | 6525 | 21 | 12 |
| smile it's contagious image | 0.04 | 0.5 | 4204 | 27 | 98 |
| smile it's contagious quotes | 1.8 | 0.5 | 7664 | 28 | 41 |
| smile it is contagious | 0.22 | 0.4 | 3790 | 22 | 54 |
| smile is contagious meaning | 1.52 | 0.2 | 9516 | 27 | 96 |
| smile is contagious quote | 0.17 | 0.2 | 8028 | 25 | 33 |
| smile is contagious poem | 0.62 | 0.4 | 6913 | 24 | 99 |
| why are smiles contagious science | 0.57 | 0.1 | 8342 | 33 | 75 |
| why are smiles contagious facts | 0.91 | 0.2 | 840 | 31 | 53 |
| how is smiling contagious | 0.11 | 0.3 | 9264 | 25 | 7 |
| are smiles contagious research | 1.61 | 1 | 2004 | 30 | 65 |
| is smiling contagious articles | 1.05 | 0.7 | 2184 | 30 | 16 |
