Her debut album Shooting Star, which contained songs she performed on The Voice, as well as newly recorded covers, was released on 13 July 2012.

The same year, she auditioned and was accepted into the music program Archived 27 February 2015 at the Wayback Machine at Brighton Secondary School.

Also at the age of 12, she entered Fellini's Search for a Star competition, where she made it through to the grand final and was chosen as one of the top 3 performers of the evening, winning $200 and the judges' encouragement award of $1000 worth of recording time at Quentin Eyres Studio.

[7] In March 2009, at age 15, Leahcar entered and won Dino Prizzi's International Festival of Song competition, winning a return trip to Rome to perform on a RAI Uno television program.

[7] Following this, Leahcar entered and won the Star Life Talent Search competition, where she received a trophy, $500 for her school and $500 in vouchers for herself to spend.

[7] In October 2009, Leahcar released a cover album entitled Rachael's Repertoire, which included ten of her most performed songs at the time.

[7] In 2011, Leahcar completed year 12 and successfully applied for Speech Pathology at Flinders University, but has since deferred this course to focus on a career in music.

[8] Leahcar progressed through to the Battle Rounds, where she was paired against contestant Adam Hoek, singing Eva Cassidy's "Over the Rainbow".

[11] In her third Live Show, she sang "Nights in White Satin (Notte Di Luce)", where she progressed through to the Grand Final after being chosen by Goodrem.

[12] During the first part of the Grand Final, on 17 June 2012, Leahcar sang an original song titled "Shooting Star", which she wrote, and Charlie Chaplin's "Smile".

[13] On 26 June 2012, it was announced that Leahcar, along with other The Voice finalists Sarah De Bono and Darren Percival, had been signed to record deals on Universal Music Australia.

The 90-minute concert aired 15 July 2012 on the Nine Network and was staged at The Palms at Crown complex, where she sang Christina Perri's "A Thousand Years".

Leahcar performed at the Sidney Myer Music Bowl for a second time for Carols by Candlelight on 24 December 2013, singing Mariah Carey's "All I Want for Christmas Is You".

[30] Following the death of Adelaide Crows coach Phil Walsh in July 2015, Leahcar lent her vocals to a tribute song, "We Stand Together (Flying as One)".

[33] Leahcar announced in June 2015, she would be touring a cabaret show, telling her life story, through to her time on The Voice Australia.