The Teenage Dream singer will be joined on the New Shepard programme's 11th human flight by former NASA rocket scientist Aisha Bowe, research scientist Amanda Nguyen, film producer Kerianne Flynn and TV hosts Gayle King and Lauren Sanchez - who is also Bezos' fiancee.
So far, the New Shepard programme has flown 52 people above the Karman line, which is internationally recognised as the boundary of space.
Named after Alan Shepard, the first American to travel into space, it can take off and land vertically.
The 40-year-old singer will travel on the next launch of Jeff Bezos' Blue Origin rocket, the aerospace engineering company said.
New Shepard is a reusable sub-orbital launch vehicle developed for space tourism.
