"We revealed a dark side to the happy tune," she said Wednesday. "It's a song that everyone's familiar with and grew up with but nobody knew that this song was copyrighted and you had to pay a license for that."
"The fact that it was illegally and wrongfully in the clutches of Warner/ Chappell really outraged people and now we've been able to rectify that situation. So it's really gratifying," she said.
"While we respectfully disagreed with the court's decision, we are pleased to have now resolved this matter," Warner/Chappell said in a statement.
The tune, with different lyrics, was written in 1893 by Patty Smith Hill, a Kentucky kindergarten teacher, and her sister, Mildred J. Hill. They called it "Good Morning to All."
They assigned the rights to that and other songs to Clayton F. Summy, who copyrighted and published them in a book titled "Song Stories for the Kindergarten."
Over the years, the rights passed from the Clayton F. Summy Co. to Birch Tree Group and then to Warner when it bought Birch Tree in 1988.
The lawsuit was filed two years ago by musicians and filmmakers who were billed for using "Happy Birthday to You."
In his September ruling, King noted that while the tune has long been in the public domain, the lyrics to "Happy Birthday to You" have a murkier background. They were mentioned in a 1901 publication but the full lyrics didn't appear in print until 1911.