Miley Cyrus in concert at G-A-Y, London

May 9: Miley Cyrus takes a break from her "Bangerz" tour to perform at London's club G-A-Y with inflatable props.

Rex Features via AP Images

Thanks in part to revised chart methodology, Miley Cyrus zooms from No. 18 to No. 2 on the latest Social 50 chart. As the chart has been reconfigured to emphasize reactions of fans to an artist's postings on social networks, a well-liked photo on Instagram can cause a huge chart jump.

For Cyrus, that means a photo she posted of her and her mother (on Mother's Day, May 11), helped Cyrus earn a 244 percent rise in weekly likes on Instagram (in the week ending May 11). The photo has already tallied 1.1 million likes.

The Social 50 chart -- which launched in December of 2010 -- now focuses solely on metrics related to fan interactions and conversations, with weekly plays from YouTube and Vevo no longer factoring into an artist’s ranking.

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Billboard’s launch of the On-Demand Songs chart in 2012 and the all-encompassing Streaming Songs chart (which includes YouTube and Vevo on YouTube views) a year ago has provided those services (and a myriad of other streaming providers) their own specific rankings. Streaming data has also become a major factor on the Billboard Hot 100 as well as our other sales/airplay/hybrid songs charts.

The Social 50's updated formula incorporates the following metrics: weekly additions of fans across Facebook, Twitter, YouTube and Instagram; reactions and conversations across Twitter, YouTube, Instagram and Facebook; and views to an artist’s Wikipedia page.

Due to the change in methodology, some artists experience notable shifts in rank compared to their standing on last week’s chart, while a number of act also re-enter.

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Selena Gomez, for example, flies 15-4, while Tyrese jumps 30-7. The latter likely motors up the list thanks to both the chart's formula change and a viral video shot by the singer/actor. He filmed a video of himself and Dr. Dre celebrating Dre becoming "the first billionaire in hip-hop" as word started to spread about the rumored acquisition of Dre's Beats company by Apple. The news caused Tyrese to experience a 78% increase in views to his Wikipedia page through the week ending May 11.

As for the rest of the top 10, Justin Bieber holds at No. 1, while Ariana Grande is also stationary at No. 3. Beyonce rises 7-5, Shakira falls 2-6 and Taylor Swift is a non-mover at No. 8. Katy Perry slips 6-9, while Nicki Minaj re-enters at No. 10.