Tim Hayes has 7 Betty Who concerts.

Jessica Anne Newham, known as Betty Who (born 5 October 1991), is an Australian singer-songwriter and musician. Newham was born in Sydney, Australia, where she lived until her mid-teens. Trained since age four as a classical cellist, She moved to the United States in 2007 to attend Interlochen Center for the Arts, whose alumni include Norah Jones, Rufus Wainwright, and Josh Groban.