[3][4] Crosby was born in Sunderland and educated at St Anthony's Girls' Catholic Academy, where she completed her A level exams.

[5] Originally considering studying criminology at university, she successfully auditioned and was cast to appear in the Tyne and Wear-based reality series, Geordie Shore.

[6] Crosby was an original cast member of MTV's reality series Geordie Shore, which she had starred in since 2011.

[9] In February 2013, Crosby appeared on The Sarah Millican Television Programme, alongside her Geordie Shore cast members Gary Beadle, James Tindale and Holly Hagan.

In January 2014, it was confirmed that Crosby would have her own reality series on TLC, where she would spend time in different cultures and live with some of the world's unique communities.

On 19 September 2015, Crosby and her home appeared on comedy panel game show Through the Keyhole.

Later that month, she made a guest appearance on the Christmas special of In Bed with Jamie on E4, which was also set in her home.

From 27 February to 3 March 2017, Crosby was a stand-in presenter on the Capital North East breakfast show whilst the regular hosts took a week off.

[22][23] In January 2019, Crosby appeared on the fourth series of Celebrity Coach Trip, alongside boyfriend Josh Ritchie.

In August 2019, Crosby began appearing in the seventh series of Celebs Go Dating to undergo ‘couples coaching’ alongside Ritchie.

[24] On 2 January 2020, Crosby was revealed as the second contestant participating in the sixth series of the Australian version of I'm a Celebrity...Get Me Out of Here!.

[28] In October 2023, Crosby was revealed to be the "Space Fairy" on the fifth season of the Australian version of The Masked Singer.

[37] Since then, she has continued to launch regular collections; however, it is no longer marketed under the "Nostalgia" brand, simply being referred to by Crosby's name.

[40] The workout DVD featured Richard Callendar and weight loss expert David Souter.

[46][47] From December 2015 to April 2016, Crosby and Gaz Beadle started a relationship outside of filming Geordie Shore.

[48]) Crosby had surgery at St John and Elizabeth hospital, in London, which involved the removal of her left fallopian tube.

[53] In early 2020, she dated Liam Beaumont, a videographer and content creator she reportedly met in Dubai,[54] but the two split in August 2021.

[64] In 2016, Crosby was arrested in Newcastle City Centre when police pulled her over in a Range Rover after witnesses reported seeing it being driven erratically.