Lamar's duet with SZA samples Luther Vandross' 1982 hit "If This World Were Mine." The song was written by Marvin Gaye, who himself recorded it in 1967 as a duet with Tammi Terrell.

BigXthaPlug, with "All the Way," and Warren, with "Ordinary," are the first acts to notch initial top 10s this year.

Ahead of their Grand National Tour, Kendrick Lamar and SZA have shared a visual for their ‘GNX’ collaboration 'Luther.' ...