[3] Blue attended Ballyfermot College of Further Education and signed with Promised Land, a subsidiary of Columbia Records, in her second year of schooling.
[9] In the summer of 2021, she performed at festivals including Latitude, Reading, Leeds, Neighbourhood Weekender, TRNSMT and Isle of Wight and in the autumn she played headline shows in London and Dublin.
[10] On 3 November 2021, Blue released her single "First Man On The Moon" with an accompanying music video, in which she wears a NASA astronaut suit.
[15] In February 2022, Blue supported English folk punk band Bears in Trees on their UK tour.
Blue cites musicians Van Morrison, Cocteau Twins, Prince, Joni Mitchell and Gwen Stefani as her biggest influences.
[2] She was inspired by Hong Kong film director Wong Kar-wai when making the music video for her second single, "Your Brother's Friend" (2021).