Ray Parker, Jr.'s "Ghostbusters" spent three weeks at number one on the "Billboard" Hot 100 chart in 1984 and a total of 21 weeks on the charts. The theme is estimated to have added $20 million to the film's box office gross. Reitman directed the successful "Ghostbusters" music video that included several celebrity cameos. Shortly after the film's release, Huey Lewis sued Ray Parker Jr, for plagiarising his 1983 song "I Want a New Drug". The case was settled out of court in 1985. Parker, Jr. later sued Lewis for breaching a confidentiality agreement about the case. In 1984, the filmmakers were also sued by the makers of Casper the Friendly Ghost for $50 million and the destruction of the film. They alleged the Ghostbusters logo was based on their character Fatso. The case was decided in Columbia's favor.