Supernova 2018 • semi-finals
| Statistics | |
| Date(s) | 3 February 2018 10 February 2018 17 February 2017 |
| Venue | LTV Studios, Riga |
| Host(s) | Justs Sirmais Dagmāra Legante |
| Voting Method | 50% Jury 50% Televoting |
| Semi-finals | Final |
| Semi-final 1 | ||||||
| # | Artist | Song | Jury | Public | Total | Result |
| 1 | Katrīna Gupalo & The Black Birds |
Intoxicating Caramel | 5 | 4 | 9 | 5th |
| 2 | Rahu the Fool | Oh, Longriver | 6 | 7 | 13 | 6th |
| 3 | DVINES | More Than Meets the Eye | 3 | 5 | 8 | 4th |
| 4 | Agnese Stengrevics | You Are My World | 7 | 6 | 13 | 7th |
| 5 | Sudden Lights | Just Fine | 4 | 1 | 5 | 3rd |
| 6 | Edgars Kreilis | Younger Days | 2 | 2 | 4 | 2nd |
| 7 | Liene Greifāne | Walk the Talk | 1 | 3 | 4 | 1st |
| Semi-final 2 | ||||||
| # | Artist | Song | Jury | Public | Total | Result |
| 1 | Hypnotic | Pray | 6 | 5 | 11 | 5th |
| 2 | MADARA | Esamība | 2 | 2 | 4 | 1st |
| 3 | Markus Riva | This Time | 3 | 1 | 4 | 2nd |
| 4 | In My Head | Sunset | 5 | 7 | 12 | 6th |
| 5 | Ritvars | Who’s Counting? | 1 | 4 | 5 | 3rd |
| 6 | Monta | 1000 Roses | 7 | 6 | 13 | 7th |
| 7 | Riga Reggae | Stop the War U2 | 4 | 3 | 7 | 4th |
| Semi-final 3 | ||||||
| # | Artist | Song | Jury | Public | Total | Result |
| 1 | Jenny May | Soledad | 7 | 6 | 13 | 7th |
| 2 | Ed Rallidae | What I Had With You | 5 | 3 | 8 | 4th |
| 3 | Katrine Lukins | Running Red Lights | 6 | 5 | 11 | 6th |
| 4 | Lauris Valters | Lovers Bliss | 2 | 4 | 6 | 2nd |
| 5 | MIONIA | You | 3 | 7 | 10 | 5th |
| 6 | Kris & Oz | Morning Flight | 4 | 2 | 6 | 3rd |
| 7 | Laura Rizzotto | Funny Girl | 1 | 1 | 2 | 1st |
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