DJ Khaled, Kendrick Lamar, Big Sean, and Betty Wright Deliver the 'Holy Key'

After a few minutes of sloganeering and DJ rewinds, DJ Khaled finally played the full version of "Holy Key" on Beats 1. The Major Key cut is just as star-packed as the album's other singles; this time, Kendrick Lamar, Big Sean, and soul singer Betty Wright share vocal duties. As they're often wont…