Plus, chart action for country newcomers Mason Ramsey and Morgan Wallen.
Mai, 23, tops the tally on the strength of her EP Ready, which debuts at No. 12 on the Top R&B Albums chart, No. 43 on Top R&B/Hip-Hop Albums and No. 87 on the Billboard 200 with 7,000 equivalent album units (up 52 percent) in the week ending May 3, according to Nielsen Music.
Mai released Ready in February 2017, but the set has grown thanks to its breakout track "Boo'd Up." Her first song to appear on any Billboard chart vaults from No. 55 to No. 37 on the Hot 100, while rising 34-24 on Hot R&B/Hip-Hop Songs. The single drew 27.8 million radio audience impressions (up 17 percent) and 15.6 million U.S. streams (up 42 percent) and sold 9,000 downloads (up 51 percent) in the tracking week.