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Omara Portuondo – OsamaSon
- Omara Portuondo
- Omar Courtz
- Omar Sarsam
- Omar Sosa & Gustavo Ovalles Duo
- Omar Sosa Trio
- Omar Souleyman
- OM-Center Baden
- OMD
- Omega
- Omega El Fuerte
- Omer Klein
- Omiki
- Omisdus
- Omnya
- Omri Hason
- On choisit ses amis… pas sa famille
- Ondine Genevoise
- One Direction
- One Last Backhand - Stan Wawrinka's farewell night
- One Morning Left
- One Night in Vegas - Elvis The Show
- One Night of Queen
- One Night of Taylor
- One Night of Tina
- One Night With USTA Soundsystem - hosted by Sido
- One Ok Rock
- OneRepublic
- One Vision Of Queen
- Only Human
- Onlynumbers
- Only The Poets
- Onoe Caponoe
- ONX
- On Your Feet - Das Musical
- Onyvaa
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- Oomph!
- OORALISE
- Opal in Sky
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- Opening Leonardo
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- Opera & Ballet Swiss Cultural Association
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- Operation Zero
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- Operette für zwei schwule Tenöre
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- Opernspiele Munot
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- Orchestergesellschaft Zürich
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