Shawn Mendes

Shawn Mendes photographed by Blossom Berkofsky on July 9, 2014 at Industria in New York.

Blossom Berkofsky

Two savvy social media stars popular on the Billboard + Twitter realtime charts make a timely entry on the Social 50.

First up: Shawn Mendes. The 16-year old who turned his fame on Vine into a record deal with Island Records, debuts at No. 32. Mendes recently saw his self-titled debut EP enter at No. 5 on the Billboard 200, and has since been touring with another teen idol born from the Web: Austin Mahone.

How Shawn Mendes Is Turning Vine Fame Into a Music Career

Mendes enters with a massive increase in engagement on Instagram, where he received more than 2.4 million post-likes in the week ending Aug. 17, according to Next Big Sound. Mendes has also had success on the Twitter Top Tracks chart, where his first single "Life of the Party" topped the chart dated Aug. 9.

Below Mendes on the Social 50, Troye Sivan re-enters at No. 39 with an across-the-board jump in online engagement following the release of his EP, TRXYE, which concurrently enters at No. 5 on the Billboard 200. He re-enters on the Social 50 with a 30 percent increase in fan acquisition across Facebook, Twitter and Instagram (where he adds 145,000 new followers). His single "Happy Little Pill" regains its previous peak on the weekly Twitter Top Tracks chart, moving 20-6 in its fourth week.

Recapping the Social 50's top 10, Justin Bieber remains at No. 1 while Ariana Grande ascends 8-2 with a 232 percent rise in overall score thanks to the release of the official video for "Break Free," featuring Zedd, on Aug. 12.

Grande's move displaces Miley Cyrus (2-3), as Selena Gomez climbs 6-4. Jennifer Lopez jumps 10-5 after revealing the racy cover artwork for "Booty," her new single featuring Pitbull. Lady Gaga rises 19-6, with an 88 percent rise in weekly activity as the pop star completed the popular ALS Ice Bucket Challenge during the charting week.

5 Seconds of Summer remains at No. 7 while Katy Perry rises 12-8 and Tyrese remains at No. 9. Taylor Swift rises 15-10, thanks to promotion building up to her album release announcement via a Yahoo live stream on Aug. 18.

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