Continuity mistake: As the Bluesmobile screeches to a halt on the sidewalk at the end of the long chase, it leaves obvious tire trails on the sidewalk. But in the very next shot (when the car breaks apart), the trails are gone. (02:12:00)
Continuity mistake: At Chez Paul when the sommelier is filling Elwood's glass with champagne, he begins to pour and does so again after the cutaway.
Continuity mistake: When the Blues Brothers are paying the assessment in the Cook County Assessor's Office, the area behind the assessor has a desk and is not very wide. In the shot where the camera has panned out, it shows a much larger area behind the assessor. Additionally, how did all of the emergency services personnel get in the room without anyone in the shot seeing or hearing them. When it cuts to this scene, the Blues Brothers look surprised, but they should have easily seen and heard this. (02:18:44)
Continuity mistake: Throughout the "Everybody Needs Somebody" song number, pay attention to the band member in the background smoking a pipe. More specifically, watch the smoke coming out of his pipe. Sometimes it's consistent from shot to shot, but at other times, it changes completely. (Ex. When Jake sings "When my soul's on fire," all of the smoke disappears between cuts).
Continuity mistake: When the brothers are in the fancy restaurant, Elwood drinks champagne from a glass. A few shots later the glass is filled back up again.
Continuity mistake: The sticker on the license plate is in the beginning on the left side (before the Bluesmobile jumps over the bridge), then on the right side (after the Nazis jump from the bridge). (00:08:35 - 00:52:40)
Continuity mistake: When the Blues Brothers first go into the tax building in Chicago, the building has gold numbers above the door that they are blocking from the inside that read 118. When the rest of the cops and a firetruck pass by, we now see the numbers are black and not even the same shape as the gold ones.
Continuity mistake: After the cop car hits the Winnebago, we see the car's back window is completely gone in two separate shots. However, when the camera angle does a close up on the car, we see a cop pushing out the rear windshield which was simply not there the shot before.
Continuity mistake: When the cop car comes out to chase the Blues Brothers from behind the sign, the car starts off directly behind the sign. When the Good Ole Boys pass in the Winnebago, we see the cop car is before the sign and already has a running start.
Continuity mistake: At Chez Paul, when Jake and Elwood first meet up with Mr. Fabulous, who is talking on the phone, there is a shot of them walking down the hallway towards him and you can see that Mr. Fabulous is looking right at the two brothers. In the next shot, his head is down and he then looks up at Jake and Elwood.
Answer: It's 'Can't Turn You Loose,' often refered to as the Blues Brothers Theme.
rabid anarchist
Also done much earlier by Otis Redding.