Plus, Louis Bell chimes in atop the Hot 100 & Lauren Daigle is the latest Christian-to-pop crossover.

Submit questions about Billboard charts, as well as general music musings, to [email protected]. Please include your first and last name, as well as your city, state and country, if outside the U.S. Or, tweet @gthot20

'ONE' TO WATCH

Hi Gary,

Jan. 12 marked the 20th anniversary of Britney Spears' debut album, ...Baby One More Time. In honor of the set's two decades, can we please get her U.S. sales updated?

Thank you,

Paul Callaghan
Portland, Oregon

Hi Paul,

…Baby One More Time has sold 10.6 million copies in the U.S. to date, making it the 17th-best-selling album since Nielsen Music began tracking sales in 1991. It's one of just 24 albums to break the 10 million-sold barrier.

Meanwhile, 2000 follow-up Oops…I Did It Again has sold 9.2 million, a sum that ranks it No. 32.

Let's recap the sales of all 15 Spears albums that have hit the Billboard 200 chart:

10.6 million, …Baby One More Time; 9.2 million, Oops…I Did It Again; 4.4 million, Britney; 3 million, In the Zone; 1.8 million, Greatest Hits: My Prerogative

1.7 million, Circus; 1 million, Blackout; 803,000, Femme Fatale; 276,000, Britney Jean; 266,000, The Singles Collection

161,000, Playlist: The Very Best of Britney Spears; 154,000, Glory; 138,000, B in the Mix: The Remixes; 55,000, The Essential Britney Spears; 30,000, B in the Mix: The Remixes: Vol. 2