Avenged Sevenfold, LMFAO, Christina Grimmie Buzzing Up the Social 50
Avenged Sevenfold, LMFAO, Christina Grimmie Buzzing Up the Social 50

Last week, Avenged Sevenfold re-entered the Social 50 at No. 44 but now with the premiere of the band's video for "So Far Away" -- the third single off the album "Nightmare" -- on May 10, the group rises 44-37 (595,000 YouTube views). The somber ballad serves as a tribute to Avenged Sevenfold's former drummer Jimmy "The Rev" Sullivan, who died in 2009.

Meanwhile, climbing 19-11, Adele matches her previous highest rank (No. 11). The singer's YouTube channel views grew 21%, which features the video for her No. 1 Billboard Hot 100 single "Rolling in the Deep."

The Social 50 ranks the most active artists on the world's leading social networking sites -- YouTube, Vevo, Facebook, Twitter, MySpace and iLike -- using a formula blending weekly additions of friends/fans/followers along with weekly artist page views and weekly song plays.

Since debuting on the tally last week (No. 39), LMFAO continues to climb, rising 39-24. The duo's satirical video "Teach Me How To Shuffle" has quickly went from 47,000 to nearly 127,000 views.

After dropping off last week, YouTube cover artist Christina Grimmie has re-entered at No. 39. A 56% change in week-over-week YouTube views has helped bring her back. Grimmie uploaded a comical video on May 14 titled Above "All That Is Random 3," which has since gained 453,000 views. She also announced that she will be releasing a new EP on June 13.

Both David Guetta and Wiz Khalifa suffer similar tumbles this week -- falling 21-31 and 22-32. Each saw steep setbacks in fans, views, and plays across all monitored social networks and music outlets.

Back in the top 10, Lil Wayne reclaims the No. 10 slot after being knocked out last week by Deadmau5 (who falls 10-15). The former released a video (May 12) for his latest single "John," featuring Rick Ross, which has already achieved 2.7 cool million Vevo views.

Lady Gaga (No. 1), Justin Bieber (No. 2), Rihanna (No. 3), Akon (No. 6), and Katy Perry (No. 7) hold their positions, while Shakira (5-4), Eminem (4-5), and Beyoncé (9-8) mix it up.