Rock also bowed down to Foreigner founder and guitarist Mick Jones during the performance. Foreigner was Rock's opening act during a record-setting 10-show run at the same venue in August 2015.
It was his first public performance in the Detroit area in nearly two years, and since he began talking about running for Michigan's U.S. Senate seat in 2018. Rock did not make any mention about the potential campaign on stage, instead extolling the virtues of his homies by recreating a rap from Bob Seger's Live Bullet album: "Y'know, I was reading in Rolling Stone magazine the other day, they said Detroit rock 'n' roll audiences were one of the greatest audience in the world. I said to myself, 'Shit, I've known that for 10 years!'" to which Hansen replied, "I can attest to that, yes I can."
After Hansen hit a particularly high note towards the end of the song, Rock said, "I can't sing as good as you, so I'll do some rapping and that's true," breaking into a quick freestyle.
He also pumped the DTE crowd that, "If you guys yell loud enough they'll do another song," but as it was just a minute before the venue's curfew Foreigner demurred, preferring to take a final bow, sans Rock.
Rock has not formally announced a senatorial campaign as of yet but has promised a press conference in the near future to discuss his plans. He recently released a pair of new songs, "Po-Dunk" and "Greatest Show On Earth," and signed a a new deal with Nashville's BBR Music Group for his next album, the follow-up to 2015's First Kiss.
Gary Graff contributed to this report.