| ACT | COUNTRYCNT | EDITIONED | FESTIVALFES |
|---|---|---|---|
| Óbó | ISIceland 2015 | | |
| Odd Hugo | EEEstonia 2015 | | |
| Oes | NLNetherlands 2015 | | |
| Ogris Debris | ATAustria 2015 | | |
| O. J. Band | BGBulgaria 2015 | | |
| Orange Skyline | NLNetherlands 2015 | | |
| Oratnitza | BGBulgaria 2015 | | |
| ORCHESTRE TOUT PUISSANT MARCEL DUCHAMP | CHSwitzerland 2015 | | |
| Ordure | NLNetherlands 2015 | | |
| Orla Gartland | IEIreland 2015 | | |
| Oscar & the Wolf | BEBelgium 2015 | | |
| Oso Leone | ESSpain 2015 | |