Photo of Adele performing on 'Tonight Show,' by Douglas Gorenstein

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After selling 2.3 million copies of 25 over the weekend, Adele returned to NBC on Monday night, this time for an interview with Jimmy Fallon on The Tonight Show.

The singer also played a game of "Box of Lies" (prompting her to jokingly call the comedian a "bitch") before performing her 25 standout "Water Under the Bridge."

» Adele Performs Intimate '25' Album Release Party

Adele's Tonight Show visit follows her Saturday Night Live appearance just 48 hours prior and it comes the same day as news that 25 has become only the second album ever to sell 2 million units in a single week and is tracking towards a record-breaking 3 million by Thanksgiving.

Update: As of Monday (Nov. 23), 25 has now sold more than 2.433 million units, surpassing *NSYNC's 2000 album No Strings Attached (2.416 million) for the largest single-week sales.

Watch Adele perform "Water Under the Bridge" and play "Box of Lies" below. (Beware: You may love her even more after watching.)