Holly O'Brien sings Ich Gehor Nur Mir from Elisabeth das Musikal
Holly O'Brien does a cover of, Stuck Like Glue by Sugarland
Holly O’Brien Show reel
Holly O'Brien-The Golden Ram
Holly O'Brien
Holly O'Brien ~ "With You" - GHOST & "Never" - ON THE TWENTIETH CENTURY
The Bride, Holly O'Brien sings Someday My Prince Will Come to her husband, Mike Roche
Holly O'Brien sings Part of your world (reprise)
Love Never Dies ~ Holly O'Brien
Paddy O'Brien - Out to California
Stephen King's Thoughts on Halloween | Late Night with Conan O’Brien
Modern Country Woman - Original country music by Holly O'Brien
Modern Country Woman - Holly O'Brien (Holly O'Brien/Kevin Wanzor)
Where is The Meeker Mansion?
Maybe ~ Holly O'Brien ~ The Marvelous Wonderettes
Holly O'Brien sings Love Never Dies from Phantom, Love Never Dies
Holly O'Brien, "Pictures of You, by The Cure
Disney's Frozen "Let It Go" - Idina Menzel (Cover by Holly O'Brien)
The Moon Represents My Heart ~ Laurance Tan and Holly O'Brien
Holly O'Brien "The World Above"