Celebrity endorsement examples include Lady Gaga with Polaroid, Beyonce with Pepsi, Taylor Swift with Diet Coke and Alicia Keys with Blackberry. A celebrity endorsement pairs a major brand with a well-known public figure for promotional purposes, according to the Business Dictionary.
Although most celebrity endorsements benefit the brand with which the celebrities are associated, they sometimes backfire. Partnerships like those between O.J. Simpson and Hertz, Chris Brown and Doublemint and Kobe Bryant and McDonald's leave a negative impression on the brand because of the stars' controversies. Simpson was accused of murder, Brown pled guilty to domestic assault and Bryant was accused of rape.