Holker was born in Minnesota but grew up in Orem, Utah, and kicked off her dance training at the age of 9. In 2002, she performed at the Olympic Games’ opening and closing ceremonies alongside Earth, Wind and Fire. She later appeared in High School Musical and High School Musical 2.
She joined season 2 of So You Think You Can Dance in 2006, and went on to appear in the nationwide tour that same year. She was also an “All Star” on seasons 7 through 11 and 14. In 2014, she joined season 19 of Dancing With the Stars as a professional.
Holker welcomed a daughter named Wesley Renae with an ex-fiancé in 2008. Welsey was later adopted by Stephen “tWitch” Boss, who Holker married in 2013. The couple — who met on season 7 of So You Think You Can Dance in 2010 — welcomed son Maddox in 2016 and daughter Zaia in 2019.
In 2017, the pair were named hosts of Disney’s Fairytale Weddings. Shortly after the duo celebrated their nine-year anniversary in December 2022, Boss died by reported suicide at age 40. Holker confirmed the news via a statement, saying, “Stephen, we love you, we miss you, and I will always save the last dance for you.”