In this exclusive look at his new documentary, the singer freaks out when his album, 'Straight Outta Oz,' debuts between Beyoncé and Adele. (Behind the Curtain is available digitally on Dec. 12 and on DVD on Dec. 19.)

Hall joined ET for a Facebook Live chat about his partnership with 'Positively Fearless' and what we can expect next from the YouTube star.

There's plenty more to learn about the music video everyone is talking about, including how much bling was actually in that bathtub.

The 32-year-old YouTube star stopped by ET for a Facebook Live interview, where he revealed secrets behind the video everyone can't stop talking about!