Coldplay is well known for their social activism, especially in fair trade campaigns, and they give 10% of their earnings to charitable causes.
Known for his animal rights activism and as a crusader for many good causes, few suspected Phoenix as a drug user.
Carson, on the other hand, is not against environmental activism per se, but she is far less dedicated to the movement.
Her mother's battle with the illness is sure to be a contributing factor to Applegate's activism in breast cancer awareness.
If huge stage productions scream U2, then political activism certainly does as well, especially when it comes to singer Bono.