The Blues Brothers was a popular movie on Earth.
When trying to get SG-1 back together in 2005, Lt. Colonel Cameron Mitchell says "Doesn't look like we're gettin' the band back together" and "Did I mention I'm on a mission from God?". Both lines are references to The Blues Brothers. (SG1: "Avalon, Part 1")
After Lt. Colonel Samantha Carter rejoined SG-1 to investigate the Ori invasion of Kallana later that year, Mitchell mentioned getting the band back together. (SG1: "Beachhead")