Rapper Pharrell Williams welcomed Kendrick Lamar during his set for the first live performance of their collaboration "Alright" at Power 106's annual "Cali Christmas" concert.

Taking the stage at The Forum in Inglewood here over the weekend, Lamar teamed up with Williams to perform the "To pimp a butterfly" single, reports aceshowbiz.com.

Following their performance, Williams took to Twitter to thank Lamar.

He shared a photograph of them on the stage and captioned it: "Wegonbealright @kendricklamar Thank you Inglewood and @Power106LA #CaliChristmas."

Pharrell also delivered live renditions of his own songs during his set. He treated the crowd to some of his hits like "Freedom" and "Happy".