o\'death
Oaktree & Avondlicht
Oasis
Oathbreaker
Obscure Sphinx
Oceansize
Odd Future Wolf Gang Kill Them All
Of Monsters And Men
Of Montreal
Off The Record
Oh Wonder
Oi Va Voi
OJAHPCP
Ojos De Brujo
Ok Go
Okkervil River
Okon & The Movement
Ólafur Arnalds
Old Jazzy Beat Mastazz
Oliver Symons
Olivia
Olli Schulz
Olly Wannabe
Olsan
Olsan Twins
Omar Perry & Homegrown Band
Omar Souleyman
OMD
Omdat Het Kan Soundsystem Feat. Average Rob
Omnikrom
On Stage @ Lokerse Feesten
One 87 & Hookerz
ONE Protestlied
One-Eyed Mule
Oneohtrix Point Never
Onerepublic
Onesixty
only tears
Only The Poets
Onmens
Opbouw expo
Openingsspektakel
Openingsvuurwerk
Opeth
Oproer
Opus Kink
Orchestre International Du Vetex
Orchid