They have toured with many bands including British Sea Power, Idlewild, Broken Records, Sivert Hoyem (ex-Madrugada) and supported the likes of The Lemonheads and Thee Oh Sees.

They were invited to support American psych-rockers Brian Jonestown Massacre on their 2010 European tour after band leader Anton Newcombe saw their video of Devil Song on YouTube.

They were also invited by Spider Stacy to join The Pogues as main support (on Anton Newcombe's recommendation) on their 2010 Farewell Christmas Tour.

[10] O'Sullivan has also released a collaborative album with renowned musicians Alasdair Roberts, Alex Neilson and Bonnie "Prince" Billy under the moniker Three Queens in Mourning (2020).

[11] In addition, she collaborated with Sean Cumming (John Knox Sex Club) on storytelling project Do the Gods Speak Esperanto,[12] released in 2017.