[1] She studied music at Roehampton University, and then returned home to Cornwall to form Rosie and the Goldbug in 2007, with bass player Lee "Pixie" Matthews and drummer Sarah "Plums" Morgan.

[11] In early 2013, after some time out recording material in New York City, she was touring again with a band comprising Goldbugs bass player Matthews and drummer Bubs Taylor.

Vanier's distinctive vocal and instrumental style has been described in The Guardian as "Kate Bush on crack with Goldfrapp on synths", her voice moving "effortlessly from seductive whispers to banshee wails".

[13] Simon Price, writing for The Independent, stated that "classically trained singer-pianist Rosie Vanier has a voice which leaps from sugary pop to operatic whoops, her ivories chiming through a repertoire ranging from the turbulent to the serene, and even juddering Moroder electro-disco".

[14] Her first solo EP, featuring a more aggressive style, was well received in The Cornishman: "... it's all here – Rosie's sex kitten, Betty Boop-gone-bad vocals, pummelling bass, choruses to die for and skittish hip hop beats.