Meghan Trainor Kendrick Lamar

Meghan Trainor; Kendrick Lamar

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The first taste of Trainor's forthcoming album arrives, while Kendrick's surprise set generates eight entries.

There's "no" stopping Meghan Trainor on the real-time Billboard + Twitter Trending 140 chart, as the pop star's new single, "No," jumped to No. 1 today (March 4) following its official release.

The Trending 140 chart measures the acceleration of conversation around artists and their music, while the Emerging Artists chart measures the volume of tweets around new artists and their songs.

Meghan Trainor Drops 'No' Single, Teases Caribbean Influences on 'Thank You' Album

Trainor, who scored the best new artist Grammy Award last month, debuted the track this morning, with iHeartMedia radio stations playing it hourly today. (Trainor also interviewed with Ryan Seacrest on iHeartMedia's On Air With Ryan Seacrest radio show, which originates from KIIS Los Angeles.) The sassy new cut previews her forthcoming sophomore studio album, Thank You, due May 13. Trainor shared the album's cover art on March 3 through her Instagram page. Her debut album, Title, topped the Jan. 31, 2015, Billboard 200 and generated four top 20 Billboard Hot 100 hits, including the eight-week No. 1 smash "All About That Bass."

Meanwhile, the surprise release of Kendrick Lamar's Untitled Unmastered pushed all eight of the project's songs onto the Trending 140 chart. "Untitled 07 | 2014-2016" led the pack, climbing to a No. 2 peak as of noon ET.

Five more of the album's tracks entered the top 10: "Untitled 02 | 06.23.2014" claimed the second-best showing, reaching No. 5, while three additional tracks each darted to No. 7 peaks: "Untitled 06 | 06.30.2014," "untitled 03 | 05.28.2013" and "untitled 08 | 09.06.2014." Just below, "untitled 05 | 09.21.2014" ascended to No. 9. Meanwhile, "untitled 04 | 08.14.2014" reached No. 17 and "untitled 01 | 08.09.2014," No. 19.

Rumors swirled about a possible Lamar release last night, hours before Top Dawg Entertainment confirmed the project's March 4 arrival. LeBron James may have secured the release, as Top Dawg CEO Anthony Tiffith posted an Instagram video with the caption "Yea KIng Kendrick returns 2nite.... Make site y'all thank @kingjames" .


Yea KIng Kendrick returns 2nite.... Make site y'all thank @kingjames ... #TDE

A video posted by gwadpot (@dangerookipawaa) on

The NBA superstar tweeted Tiffith after Lamar's Grammy performance to ask for the untitled tracks' release:

Lamar's Grammys performance was widely praised and the Compton rapper took home five awards during the ceremony, including best rap album for his To Pimp a Butterfly. The album debuted at No. 1 on the Billboard 200 in April 2015.