http://www.emmaomalena.com/emma-watson-david-letterman/
Do people get paid to promote their work in talkshows?
Do people get paid for her appearances in the promotion of their films and albums on the talk shows? ie. Emma Watson appears on David Letterman to talk about Prince, Demi Lovato appears on It's On With Alexa Chung to promote his album, etc. The interview "to pay for their time?
Yes paid apx. $ 500 to appear. They are making $ 1 million to appear in the film so they are not doing this for the money talkshow. It's in his contract for the film that will be presented to three talk shows, a first film red carpet, and maybe answer some questions for 2 hours on the website of the film.
Emma Watson on the David Letterman Late Show (2009)