It started with a simple notion: Rising country star Margo Price teams up with Shawn Sahm to sing a Doug Sahm song on Doug Sahm Hill.

It pretty much turned out that simple, too. Price, whose recent debut album hit the country top 10 and landed her on “Saturday Night Live” this spring, was in town to play the Austin City Limits Music Festival on Sunday afternoon and tape the “Austin City Limits” television show on Monday.

Tuesday, Price joined Shawn Sahm, who drove in from his Hill Country home, for an Austin360 video tribute to the music of Shawn’s father. They gathered as the sun set over the gentle sloping hill in Butler Park that was named for Doug Sahm in 2008.

One of the most influential artists in the history of Texas music, Sahm hit the pop charts in the 1960s leading the Sir Douglas Quintet. He made country-leaning major-label albums in the ’70s, recorded blues for Austin label Antone’s in the late ’80s and won a Grammy Tex-Mex supergroup Texas Tornados in the ’90s. He died of a heart attack at 58 in 1999.

Shawn Sahm, Margo Price and Cheryl Sahm (Shawn’s wife) atop Doug Sahm Hill on Tuesday, Oct. 4, 2016. Peter Blackstock/American-Statesman

These days, Shawn keeps his father’s legacy alive playing with Flaco Jimenez and Augie Meyers in a reconstituted Texas Tornados. Meanwhile, Doug’s music has continued to inspire younger artists such as Price, who appreciate his melting-pot mindset to music. “As an artist, I always hope to keep growing, and I don’t want to box myself in,” Price says. “So I really identified with him when I found him.”

On Doug Sahm Hill, Shawn and Margo ran through “Give Back the Key to My Heart,” which Price often performs, as they rehearsed. Eventually they settled on “I Wanna Be Your Mama Again,” which Price and her band had performed at Monday’s ACL taping.

As a bonus, they offered up a classic recorded in the 1970s by both Sahm and Charley Pride and in the ‘90s by the Texas Tornados:

WATCH: Shawn Sahm & Margo Price, “Is Anybody Goin’ to San Antone”

Price returns to Zilker Park for the second weekend of ACL Fest, performing with her band the Price Tags at 3 p.m. Sunday on the HomeAway Stage.

READ MORE: Margo Price feels at home in the city Doug Sahm once roamed