Pharrell Williams reunites with Lamar to perform 'Alright'

Los Angeles: "Happy" hitmaker Pharrell Williams and rapper Kendrick Lamar performed their collaboration "Alright" at "Cali Christmas" concert over the weekend.

"Alright", lyrically a festive song about hope, features uncredited vocals from the song's co-producer Williams during the chorus.

Taking the stage at The Forum in Inglewood, Los Angeles, Lamar did most of the rap and teamed up with Pharrell for the hook of the "To Pimp a Butterfly" single, reported Aceshowbiz.

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

The day featured appearances from Wiz Khalifa, Macklemore and Ryan Lewis, Travis Scott (II), Ty Dolla $ign and G-Eazy.