Guest judges often go easier on contestants than the regular panelists, which is why many viewers were shocked that Flav, 66, was the sole reason Alix Earle and her partner, Val Chmerkovskiy, didn’t get a perfect score for their paso doble.

"Rock & Roll Hall of Fame Night" featured dances to songs by Aerosmith, Bon Jovi, Elton John and more as well as a team dance battle.

Watch the 20th celebration of "Dancing with the Stars" on Tuesday, Nov. 11, at 8 p.m. ET/PT on ABC and Disney+, streaming the next day on Disney+ and Hulu.

Elsewhere during the show, Tanner Smith and Connor Tomlinson of Love on the Spectrum were seen greeting contestants backstage, as Tanner met and hugged both Robert Irwin and Whitney Leavitt, as well as her dance partner Mark Ballas.

The remaining couples dance to classic hits celebrating the legends of rock in a new episode of "Dancing with the Stars" airing on Tuesday, November 4.

With Halloween night in the rearview, the twinkle-toed cast of "Dancing with the Stars" is gearing up for another raucous theme night.

Last night's episode of "Dancing with the Stars" was a rock and roll theme, in honor of the Saturday, Nov. 8, Rock and Roll Hall of Fame induction ceremony. And Rock and Roll Hall of Fame Inductee Flavor Flav was the guest judge for the night, throwing up enthusiastic high scores.

Get details on the DWTS Halloween Night episode with song list, the Dance Monster-thon, song picks and how to stream 'Dancing with the Stars'

Dancing with the Stars' continued on Nov. 4 with its Rock & Roll Hall of Fame Night. PEOPLE's full recap provides all the updates from the evening, including how the couples scored, the biggest moments from the night and who was booted from the competition.