Kendrick Lamar Joins Rihanna On Stage At Christmas Party and Toy Drive

(Radio.com) Rihanna was joined onstage by Kendrick Lamar at an almost free concert at Los Angeles' Nickerson Gardens housing project on Thursday (Dec. 21); the cost of admission was an unwrapped gift donation.

The special event was the fourth annual #TEDXmas, also known as the Top Dawg Entertainment (the company that manages Lamar among others) holiday party.

Rihanna headlined the event, and during her set she and Lamar performed their hit collaboration, "LOYALTY." Rihanna also played, 'Wild Thoughts," reports Fader. Check out clips for the star collaboration here.