Martin was born in Las Vegas, Nevada and has two brothers and one sister. She started modeling at age five. Martin also appeared in several community theater productions in Las Vegas such as Peter Pan and performed for her Showteam and later made her professional theater debut in a Los Angeles production of 13. She appeared in several television commercials such as for Cabbage Patch Kids and Barbie.
On June 16, 2011, Martin appeared for one night in Super Summer Theatre's live production of "Annie" at Spring Mountain Ranch in Las Vegas, Nevada in the role of Star-To-Be. Martin is also starring in Wendy (web series) as Wendy alongside Tyler Blackburn. Wendy is a dark twist on 'Peter Pan'. The series premiered on macys.com on September 15, 2011. In 2013, Martin appeared in the film adaptation Geography Club as Trish, while she appeared in one episode of MTV's Awkward and the thriller The Good Mother was aired on Lifetime Channel. Martin voiced the character of Jessica in the PlayStation 4 exclusive Until Dawn. Martin, along with the rest of the cast, received very positive reviews for her/their voice work in the game. The game was nominated for various awards. The game has proved to be popular among audiences and has sold past expectations, with a sequel in the works and a spin-off; Until Dawn: Rush of Blood being released in the future for the PlayStation VR.
Martin recorded two songs in Camp Rock, "Too Cool" and "2 Stars". Martin sang a version of "When You Wish Upon a Star" for the 2009 re-release of Disney's Pinocchio, as well as appearing in the related music video. The song debuted at number fifty-two on Billboard's Hot Dance Club Songs chart, becoming her first and only chart single. It has since peaked at number thirty-seven.
Martin also recorded a version of the Olivia Newton-John song "Magic" for the Wizards of Waverly Place soundtrack. Martin has partnered with Build-A-Bear Workshop for their "Love.Hugs.Peace" movement. For the ad campaign, Martin recorded a special version of "Let's Talk About Love". Martin also recorded two songs in Camp Rock 2: The Final Jam, "Tear it Down" and "Walkin in My Shoes", alongside the Camp Rock co-star Matthew "Mdot" Finley. Martin also appear on the collaborative song "It's On", which features the co-stars of the film. All songs appear in the soundtrack of the film.