This Heart "Tells it Like it Is" 1980 tour poster (for sale on eBay) does not include any mention of a stop in Duluth and also indicates the tour didn't start until March 26. The only Minnesota stop listed is "Minneapolis," although that was at the Met, technically in Bloomington. An audio recording of that show is available on YouTube.



The band released the album Bébé le Strange on Feb. 14, 1980. It seems weird that the tour would be named "Tells it Like it Is," referencing the cover song "Tell it Like it Is," which is a studio track on the double album Greatest Hits/Live, which wasn't released until Nov. 29, 1980. 

If you look closer at the tour poster, however, it lists the total attendance and gross revenue of the tour, which would indicate the poster was not created to promote the upcoming tour, but was instead produced after the tour to promote the success of the tour. Which means it's likely the tour wasn't really called the "Tells it Like it Is" tour when it happened, but was instead dubbed that retroactively because "Tell it Like it Is" was a successful single in the winter of 1980-'81.

The image below, from Heart's Facebook page, is of a newspaper ad for a 1980 tour stop in Savannah, Ga. along with a ticket stub. It does not contain the phrase "Tells it Like it Is."



So, all of that is just to say that the tour probably wasn't called "Tells it Like it Is." It doesn't help much as far as determining whether the band was in Duluth in 1980, but it does lead one to think it is unlikely there was a 1980 Heart show in Duluth.

Setlist.fm does list one Heart concert in 1980 prior to the March 26 start of the official tour. The band apparently played on Feb. 1 at the Frank Irwin Center in Austin, Texas. However, the tour poster indicates the band played in Austin on March 28 and Setlist doesn't list a March 28 show, so it's difficult to say one or the other is accurate.

Setlist.fm does list a Heart concert at the Duluth Arena on Nov. 26, 1978.