The rapper/singer took to Instagram Live over the weekend to share a snippet of a brand new 80's-style dance track called "Jealous Type".
Swift's legal team issued a cease and desist after the rapper claimed she had a threesome with Harry Styles and Justin Bieber.
The pop icon's 9th project - a "one of a kind pop opera" - will be released on May 30.
The enigmatic singer-songwriter surprised the crowd with a stirring eulogy and a performance of "First Time Ever I Saw Your Face".
Roc Nation CEO Desiree Perez said that Jay Z was very hands-on in the decision and that "Kendrick's richness and culture is really a nod to New Orleans."
The album, which features the single "Bad Choices", is due out February 7.
The "I'm Not Racist" rapper issued the challenge on Twitter earlier this week. Meek Mill has yet to respond.
The full lineup inclues Billie Eilish, Stevie Wonder, and Green Day. All proceeds go to benefitting those impacted by the recent California wildfires.
All proceeds from this star-studded benefit concert will fund short-term relief efforts and fire prevention initiatives throughout Southern California.
The song is the first single from Mac Miller's upcoming posthumous album "Balloonerism", which is set to drop on January 17.
