Career
She is also known for her recurring roles as Jo Taylor on Big Time Rush, Natalie on Number Ordinary Family, and Mercedes on The Secret Life of the American Teenager. Tarver took part in the reality television program American Juniors. Her debut, "Wonderful Crazy," featured songs written and produced by Mattias Gustafsson (Backstreet Boys) and Kevin Savigar (Josh Gracin, Rod Stewart), as well as Christian recording artist Scott Krippayne who wrote the title track.
On June 14, 2011, Tarver independently released her "A Little More Free" European Parliament (produced by Matt Grabe) and was Honor Society"s opening act on their June–July 2011 "Wherever You Are" tour.
In the summer of 2012, Tarver toured alongside the bands The Cab and Parachute. Using motion capture, Tarver acted as the title character in the direct-to-video movie The Barbie Diaries, released in 2006.
Sensors recorded her movements so they could control the movements of the animated Mattel"s Barbie figure. She also appeared in the video for Mitchel Musso"s single "The In-Crowd" and duetted with him on "Us Against The World".
He had arrived early to his recording session as she was in the studio working on her track "Fastlane".
When it was Mitchel"s turn, his father Sam suggested trying it as a duet with Katelyn. Big Time Rush
On January 29, 2010, she made her acting debut on Big Time Rush as Jo Taylor, a girl the boys admire. Her debut episode was "Big Time Love Song" which aired on February 5, 2010.
She developed feelings for Kendall Knight (Kendall Schmidt) and they started dating.
But the world tour changed everything: Jo became a television star and Kendall became a popular star. On "Big Time Break-Up" which aired on June 25, 2011, she landed a role in a movie in New Zealand which would keep her and Kendall apart for 3 years.
She returned in season 3"s episode "Big Time Surprise", which aired on September 22, 2012. Number Ordinary Family
From 2010 to 2011, Tarver appeared as Natalie Poston in 5 episodes of the American Broadcasting Company series Number Ordinary Family.