PSY & Snoop Dogg, Nicki Minaj: Real-Time Twitter Chart Rewind Video Show Ep. 2 (Watch)

Welcome to Billboard's weekly video show "Real-Time Rewind," which recaps the past week's hottest action on the new Billboard Real-Time Twitter Charts -- Trending 140 and Emerging Artists -- and the news that's driving the action. Hosted by Billboard's Joe Levy, you can watch episode 2, which features PSY & Snoop Dogg, Charli XCX, Nicki Minaj and more, right here.

VIEW THE REAL-TIME CHARTS: TRENDING 140 | EMERGING ARTISTS

So what was happening on the Real-Time Charts this week?

First up is PSY, who, after some key promotion from Jimmy Kimmel, saw this new new track featuring Snoop Dogg, "Hangover," quickly rack up 12 million views. Charli XCX's "Boom Clap," meanwhile, has been a regular on the Trending 140, thanks in part to the fact that its in the hit film "The Fault In Our Stars." And Nicki Minaj's "Pills N Potions" music video.

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.

Watch Last Week's Episode Featuring Drake and Kimbra