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 12, which features Taylor Swift, Nicki Minaj and Charli XCX.

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

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

Taylor Swift premiered her first single, "Shake It Off," off her upcoming album 1989, and its accompanying music video on Monday, Aug. 18 via a Yahoo! livestream. It skyrocketed to No. 1 on the Trending 140 chart and stayed there for the following 10 hours.

Charli XCX new single, "Break the Rules," shot to No. 1 when it debuted on Aug. 18. She currently has a top 10 on the Hot 100 chart with "Boom Clap."

Nicki Minaj's second The Pinkprint single, "Anaconda," shot to the top of the Trending 140 chart after the official video debuted on Aug. 20.

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 Previous "Real-Time Rewind" Episodes:
1. Drake, Kimbra | 2. Psy & Snoop | 3. Lana Del Rey, Maroon 5
4. Robin Thicke, Sam Smith | 5. Busta Rhymes  & Eminem | 6. Ariana Grande, Alt-J & 5 Seconds of Summer
7. Britney Spears, PARTYNEXTDOOR & Naughty Boy| 8. "Weird Al" Yankovic | 9. Jessie J, Troye Sivan

10. Beyonce, Nicki Minaj & Nick Jonas | 11: Ariana Grande, Jake Miller & Kanye West