Stevie Nicks and Billy Joel kicked off their first of eight engagements dubbed Two Icons: One Night, on Friday, March 10th.

The singing songwriting septuagenarian superstars (Nicks is 74, Joel is 73), will be hitting U.S. football stadiums this year at a rate of about one a month -- with a few months off during the summer.

The blockbuster kickoff was held at the sold-out $5.5 billion SoFi Stadium in Los Angeles County, and featured several highlights. 

The most controversial was during Nicks' opening act, when she and Joel dueted on "Stop Draggin My Heart Around," which was a hit off her 1981 solo album, Bella Donna. Eyebrows were raised when Joel sung the lines fans have heard on FM radio for decades delivered by Tom Petty (who co-wrote the song with Heartbreakers guitarist Mike Campbell).

The Nicks / Petty duet was Stevie's highest-charted US single of her solo career and even spawned a Weird Al parody - a sure sign of success.

The problem was two-fold: Tom Petty is as beloved as any rock and roll hall of famer, and Joel's style (nor image) is an awkward - almost forced - fit for a duet classic rock aficionados have had ingrained in their hearts.

As one Twitter user said, "I liked this okay in theory. Then I watched the video..."

It'll be interesting to see if the duet is utilized in future shows.

Petty is all over Stevie's setlist. She opens with a recording of Petty's "Running Down a Dream," and she has been covering his tribute to the San Fernando Valley, "Free Falling," regularly since last year. The SoFi show was no exception. There was a thoughtful montage of the two singers together on the screens behind the stage and around the enormous new stadium.

But Stevie will always be associated with Fleetwood Mac. Another moment of note was when she performed the band's classic, "Landslide." This was the first concert Nicks had performed since the death of long-time bandmate Christine McVie.

At the end of the touching song, Nicks said, “There’s really not much to say. We just pretend that she’s still here, that’s how I’m trying to deal with it.”

Then she took a bow with her band.

The future of The Mac is in doubt with McVie's passing, which might be one reason Nicks dusted off "Sara" a song she wrote for the band's Tusk album, which she only rarely performs solo.

Fans ate up the tender tune about either an unborn child she never had with former boyfriend Don Henley or about her friend who dated Mick Fleetwood - it depends on who you ask. It was the first time since 2008 that Stevie sang it during a solo gig.

During Joel's set, Stevie joined the piano man at his baby grand for a duet of "And So It Goes," a deep cut from his 1989 album Storm Front, which he had written about his short relationship with Elle Macpherson when the supermodel  was but a teen and he was in his 30s.

The reaction of that duet was far more positive.

Joel doesn't tour very much. He is poised to do his 90th residency engagement at Madison Square Garden in April and a big show across the pond in England this summer. The best way to see him outside of Manhattan will be on the Nicks co-headlining tour. 

Stevie, however, will be easier to catch as she will be touring through the spring and parts of summer alone and with Billy. You can get tickets for her tour here.