Definition: In this task, you're given a passage, further information available on a particular linked term from the statement, and a question. Your job is to generate the answer to the question by using the information provided. If there is no clear answer obtainable, output 'none'.
Input: Passage: Staying true to her love of music, Jayne's first dance music single "Roller Coaster" was released on January 1, 2007. The song placed at number one on the Billboard Hot Dance Club Play chart. Her second single "Stars" also placed at number one the Billboard Dance Play chart and music video for the song spent 12 weeks (peaking at number 2) on Logo TV's . In 2007, British newspaper The Guardian wrote that Erika Jayne "is Madonna trapped in the moment when she recorded the Erotica album. She's Nicole Kidman in Moulin Rouge goes trance with a dash of debauchery, or Gwen Stefani goes burlesque." Jayne's debut full-length album Pretty Mess, was released in the United States on August 11, 2009. Sheila E. is found playing percussion on the song, "Time to Realize" and the album includes a cover of Apollonia 6's 1984 hit "Sex Shooter." Peter Rafelson and Eric Kupper served as producers and co-writers on Pretty Mess, while Canadian singer-songwriter Esthero, Jahi Lake and Ike Dirty contributed additional production. The other singles from the album were "Give You Everything" and "Pretty Mess", which topped the dance club charts. The album spawned a total of four number-one singles on the Hot Dance Club Play chart, tying her with Rihanna and The Pussycat Dolls for most number one singles from a debut release. She released three different music video versions of "Give You Everything". The music videos were directed by feature film director Marty Thomas. Remixes of "Give You Everything" placed at number 2 on the Music Week Upfront Club Chart as well as number 6 on the Music Week Commercial Pop Club Chart, marking her first time to land on the United Kingdom charts. Jayne supported the release of Pretty Mess with tour dates and appearances at festivals and clubs across the United States. In November 2010, Jayne announced the creation of her own record label, Pretty Mess Records.
Link Information: none Question: How many copies combined were sold of Erika's first two singles?
Output:
Answer: none