This measuring tape has been around the world because it has been passed around by famous designers. People used it to work with Lady Gaga, Selena Gomez, and other people like Kesha. They have fought over who gets to use it. I guess that they think that it brings good luck to them before they preform on their tours across the world. My guess is that if they have special things that they think can help them preform better on stage, then they will use it.