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: In the beginning of the movie, when Jake and Elwood jump the drawbridge you see the gate arms are down. When the car lands on the other side the gates are up. (00:09:10)
Continuity mistake: The first bridge in the movie is rising very fast. When they drive on the bridge, it stands lower than before, and the jump they make, is over a small area, although you see later that the bridge is completely up. (00:09:25)
Continuity mistake: In the beginning of the movie, when Jake and Elwood jump the drawbridge they show a shot along the passenger side of the car as Elwood floors it to make the jump. Watch the rear tyre. The driver slams on the brakes as they approach the raised portion of the bridge. (00:09:30)
Continuity mistake: Where Curtis is getting Elwood and Jake a drink of Jack Daniels, when he gets the bottle it's nearly full, but ten seconds later, after he has got some drinking glasses and starts to pour, it's almost empty. (00:15:45)
Continuity mistake: During the church scene at the beginning of the movie, when Jake is doing cartwheels down the aisle, you can clearly see suspenders attached to the back of his pants. In the next scene, they are gone. (00:21:55)
Continuity mistake: When Elwood and Jake "See the Light" at the church, they begin dancing wildly at the far end of the aisle - yet in a static shot of the dancing later on, the Blues Brothers are seen standing still at the end of the church, just as they did before Jake saw the Light. (00:23:00)
Continuity mistake: At the end of the church scene, James Brown is shown placing the microphone back on its stand. Then it cuts to a wide shot of James pacing the stage, mic in hand. (00:23:50)
Continuity mistake: When Jake and Elwood are running form the police for the first time, they do a 360 degree spin in the middle of an intersection. The car is spinning clockwise but when the camera focuses on Jake the scenery in the back is spinning as if they were going counter-clockwise. (00:27:35)
Continuity mistake: In the mall chase scene, when the police car flips over, you can see the antenna break off the side of the car. When they cut back to the car again, you can see it break off once more. Then, when they show that the car has stopped spinning, the antenna is completely intact. (00:31:15)
Continuity mistake: In the shopping mall car chase scene, the police cars that tips over has got siren lights at the top but when they tip over and slide along the floor and spin, on the inside view of the car, you can see the lights have been taken away for the car to slide better. On the outside view of the car sliding you can see the lights on the top of the car. (00:31:50)
Continuity mistake: In the first scene where we see Carrie Fisher, during the 'Peter Gunn' sequence, she pulls out a bazooka with four barrels and fires one missile at the Blues Brothers. Then in the next shot (looking down on her car), she fires another four missiles without reloading. (00:35:00)
Continuity mistake: Just before the Mystery Girl blows up the building in which Elwood resides, a police car with lights on its roof pulls up outside. When the building actually explodes just over a minute later, you see that the police car parked outside no longer has any lights. (00:39:54)
Continuity mistake: In the deleted scene where Elwood goes into the manager's office to quit, right before he walks in the door he sets his briefcase down, it is slightly crooked and in the center of the floor. When he goes to leave it is sitting straight and further to the left. (00:42:45)
Continuity mistake: When the Blues Brothers park outside Mrs. Tarantino's house, the car's front wheels are almost level with the path to her front door. When they start the car to drive off a bit later, it is parked further back with its front bumper level with the path. (00:44:06)
Continuity mistake: In Chez Paul's restaurant, when Elwood and Jake first sit down, the waiter in the top right of the wide shot walks around a seated man in a dark suit; four seconds later, in a closer shot of them putting their napkins on, the waiter walks round the man again. (00:50:37)
Continuity mistake: After we've heard why it's so great to be an Illinois Nazi, there's a wide shot of Jake and Elwood's car in a queue, and a policeman walks past the driver's door. In the next shot, the cop hasn't yet walked past the door, and instead of doing so, he stops when the Blues Brothers ask what's going on. (00:56:14)
Continuity mistake: When the Blues Brothers go to persuade Matt and "Blue" Lou to rejoin the band, and they have just ordered their signature meals from Aretha Franklin, she goes to Matt in the kitchen to moan. Matt is cooking two burgers of some kind, but in a shot of Aretha 30 seconds or so later (when Matt says not to talk that way around his old lady), the burgers have moved and multiplied. (01:00:53)
Continuity mistake: When the three ladies of the Soul Food Chorus get up to sing "Think" with Aretha Frankin, their food is sitting on the counter; ten seconds later in a wide shot, it has gone. (This is undoubtedly so that "Blue" Lou can do his thing on the counter.) When the ladies sit down again and get a nasty look from Aretha after Matt and Lou have left, their food is back again. (01:02:50)
Continuity mistake: At Bob's Country Bunker, Jake takes one of the beers and drinks it. When he grabs another beer, there are the same number of beers there were before (without subtracting the beer he took before). (01:17:25)
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.