Question: What is the name of the mother of British singer-songwriter whose second studio album, released in 2005 was called 'Sleeping in the Nothing' and who has been a judge on "Australia's Got Talent"?
Sentence (from "Jack Vidgen"): Jack Vidgen (born 17 January 1997) is an Australian singer, best known for winning the fifth season of "Australia's Got Talent".
Relevant evidence: No