Jane de Jong (born 1987), known professionally as Ruby Frost, is a New Zealand singer and songwriter from Auckland. In 2009, she won the nationwide music competition MTV 42Unheard, giving her a recording contract with Universal Music New Zealand. Since then she has performed showcases at CMJ in New York and The Viper Room in LA; toured with Mt Eden, Cut Copy, Evermore and Van She; and opened for acts including Diplo, Nero, Kimbra, Digitalism and Garbage. She was one of the four judges in season one of The X Factor NZ, and was the runner-up mentor when her act Whenua Patuwai came second in the competition.

In December 2011, Ruby Frost released her debut single "Moonlight" on bFM, which went to #1 and stayed in the radio station's top 10 for 10 consecutive weeks. The accompanying video was directed by Veronica Crockford-Pound.

Ruby Frost's song "O That I Had" (off her debut, self-released EP) was remixed by Mt Eden in 2010, receiving over one million views on YouTube.

In 2010, Ruby won the Grand Prize of the Pop category in the international John Lennon Songwriting Contest: Section I. This was for her demo "Hazy".

Ruby also came in third place in the Pop/Top 40 category of the International Songwriting Competition (2011), for "Hazy".

In 2012, Ruby's song "Water to Ice" was shortlisted in the Top 20 for the NZ APRA Silver Scrolls.

Frost's debut album Volition was produced in New York by Chris Zane and was released in New Zealand on 8 June 2012 by Universal Music New Zealand. Physical copies of the album came complete with abstract short stories written by Ruby.

The album was critically well received.^{[citation needed]}