By Keith Staskiewicz
Updated May 01, 2011 at 12:00 PM EDT
Credit: Paul Drinkwater/NBC

Aerosmith frontman, American Idol judge, and wacky formulator of bon mots Steven Tyler joined Matt Lauer on Dateline tonight to discuss his history of drug use, fights with his band, and his new gig on primetime television.

The most interesting tidbit of the interview was Tyler’s admission that he was taking drugs as recently as 2009; he was high on stage during his infamous spill, and a subsequent trip to rehab contributed to the fracturing of Aerosmith. Tyler also revealed that during the band’s heyday, venues were contractually obligated to have a small off-stage cubby for members to snort some of that sweet, sweet emotion. “I needed blow,” Tyler told Lauer. “I needed that cocaine. I needed it.” But he lamented the effect it had on his life and relations, including with daughter Liv: “That’s what drugs did. It took my children away, it took my band away, it took my marriages away, and I was on my knees.”

Tyler also talked about his relationship with the rest of Aerosmith, and guitarist Joe Perry in particular, summing the two of them up as “Joe’s a creep, I’m an asshole.” He admitted to being hurt by the fact that his bandmates didn’t contact him when he was in rehab, and said that currently, they’re not on the best of terms. “We’re fighting right now,” Tyler revealed.

Most of these topics are covered in Tyler’s upcoming memoir, Does the Noise in My Head Bother You?, which hits stores on Tuesday. Tyler explained the title of the book to Lauer with an impromptu ditty, implying that phantom improvisational music is playing in his head at all times. Which, I guess, might explain some of his more questionable decisions on the American Idol judges’ panel.