From Longman Dictionary of Contemporary Englishmegastarmeg‧a‧star /ˈmeɡəstɑː $ -stɑːr/ noun [countable] informalAPAM a very famous singer or actor
Examples from the Corpus
megastar• As a singer, Mr Jackson is a certifiable megastar.• country megastar Garth Brooks• Thanks to the microphone and the camera, a few megastars can communicate the appearance of power and commitment at great distance.• His writing is a joy, combining the telling quote from finance megastars with anecdote to illustrate a substantial point.• When Kylie first got involved in the film, rock megastar David Bowie was to have been the film's executive producer.• If I cut my cloth to suit popular taste I wouldn't be the megastar I am today.• He has become the megastar who will not leave gently or graciously.• Which megastar was about to beamed in from a Hollywood poolside to give a transatlantic Tory thumbs up? 