Sophie Simmons

In early 2018, she released two solo singles, "Black Mirror" and "Burn Me Down". The music video for "Black Mirror" was released on February 23 on Billboard. Written by Simmons a year earlier, the song, like the television show from which it gets its name, deals with people's relationship with their smartphones and social media. "Black Mirror" debuted on Billboard' s Dance Club Songs chart at Number 43 on April 14. The song remained on the list for ten weeks peaking at Number 20.

Simmons again wrote a single with Yellow Claw and DOLF called "Cry Wolf", released in April 2018. The song featuring Simmons on vocals was released as a single before Yellow Claw's third album, New Blood. Simmons was also credited as one of the composers on "Summertime", a song featuring San Holo on New Blood. In June 2018, she released her third solo single of the year, "Paper Cut".

In 2015, Simmons released her debut single, "Kiss Me", a cover of the Sixpence None The Richer's 1998 song by the same name. In March 2017, she collaborated with the DJ duo Yellow Claw for a song on their second studio album, Los Amsterdam. Simmons is the lyricist and vocalist on the album's first track, "Home".

In 2014, Simmons launched a body positive clothing line for The Style Club. She became a model, an advocate for body positivity. She was also featured in the 2016 documentary Straight/Curve which focuses on the debate over body image in modelling.

In January 2012, Simmons lent her name to Sophie's Place, a partly government-funded child advocacy centre. She advocated for the creation of the centre with the help of the mayor of Surrey, British Columbia, Dianne Watts, and the Royal Canadian Mounted Police. Simmons and her family continue to support The Centre for Child Development and Sophie's Place Child and Youth Advocacy Centre by fundraising for the organizations which provide "a safe space where [children] can talk about their experience of physical, mental or sexual abuse with trained staff and law enforcement professionals."

In 2012, Simmons auditioned for the second season of the Fox music competition show The X Factor. She advanced to the Bootcamp but was eliminated in that stage of the competition. In June 2013, she performed alongside the Canadian vocal group The Tenors at their performance at the Greek Theatre in Los Angeles, California.

At 11 years old, Simmons began appearing on the reality television series Gene Simmons Family Jewels on A&E. The show featuring the family of four, including her brother Nick Simmons, ran for seven seasons from 2006 to 2012.