[14] Later in 2018, Sherlock signed a five-year contract with Patriot Records, owned by OneRepublic lead vocalist, Ryan Tedder.

[18] During their European tour in March 2020, Sherlock supported OneRepublic at concerts in Paris (France),[19] Cologne (Germany),[20] Utrecht (Netherlands),[21] and the London Palladium (UK).

[25] Also in 2020, Sherlock was part of a collective of female artists called "Irish Women in Harmony", that recorded a version of Dreams in aid of a domestic abuse charity.

[7] On 4 June 2022, Sherlock performed at the AO Arena in Manchester (shown on ITV) for the Platinum Jubilee of Elizabeth II celebrations.

[citation needed] On 7 April 2023, Sherlock celebrated her 18th birthday and released the album Allie, including 11 cover songs.

[28] Some of her original songs are "Hero",[29] "Locked Inside",[29] "Without You" (released July 2021),[30] and "Leave Me With a Decent Goodbye" (September 2021).