The biggest leap on Billboard's Social 50 chart this week belongs to YouTube phenomenon Alex Day, who profits from the buzz generated by his top five debut on the Official U.K. Singles chart. On the Social 50 tally, he flies 47-28 in just his second week on the list.
The chart's rankings are determined by activity monitored on YouTube, Vevo, Facebook, Twitter, MySpace and iLike, using a formula that blends weekly additions of friends/fans/followers along with weekly artist page views and weekly song plays.
Day's "Forever Yours" debuted at No. 4 on the U.K. Singles Chart with 53,000 units sold and drummed up a lot of buzz on the singer in his challenge to be the (much-talked about) "Christmas No. 1." The ultimate victor was "Wherever You Are" by the Military Wives, which shifted a massive 556,000 copies.
"Forever Yours" has been viewed 3 million times since it was uploaded to YouTube on Dec. 1 . All told, he has over 487,000 subscribers and earned more than 69 million views to his videos. The British personality's YouTube channel  is currently the third-most subscribed among all musicians in the United Kingdom.
During the tracking week for the chart (which ended on Christmas day, Dec. 25), Day saw a 50% gain in fans for the week, a 42% gain in Twitter followers and a whopping 312% jump in YouTube views.
Elsewhere on the Social 50 this week, Michael Buble leaps 32-19 -- a new peak -- no doubt a gain earned by attention generated by his "Christmas" album. The most recent tracking week for the Social 50 chart ended on Christmas Day (Dec. 25), so it's unsurprising to see Buble bounce up the tally.
Buble earned a 95% uptick in fans for the week along with a 212% spike in YouTube views. His "Christmas" album remained No. 1 on the Billboard 200 chart for a fifth straight week, selling 467,000 copies according to Nielsen SoundScan (up 4%).
Back in the top 10 this week, Justin Bieber and Adele are non-movers at Nos. 1 and 2 while Eminem rises 4-3. Rihanna skips 5-4, Shakira slips 3-5 and LMFAO jumps 9-6. Pitbull rises a position to No. 7, Katy Perry is also up one to No. 8 and Chris Brown climbs two spots to No. 9. Lady Gaga closes out the top 10, falling 6-10.
- Chart Beat