Reverend and the Makers will perform at Wembley today after one of their songs was chosen as the first ever official FA Cup anthem.
A Millwall fan caught hiding a police helmet during clashes between supporters and the police has said he is "disgusted" by his behaviour.
Aldershot met Middlesbrough for the first time in the FA Cup - but it wasn't a happy meeting for the Hampshire side.
City are anxious to claim the FA Cup as consolation following their failure to defend the Barclays Premier League title they won last season.
They are odds-on favourites against the Latics, whose progress to the final has been overshadowed by their battle against the drop.
But Mancini is taking no notice of the form book and has warned his team must be on top of their game, much like his old Sampdoria team were then they thrashed Serie B Ancona 6-1 in the second leg of 1994 Coppa Italia final.
He said: "I played Sampdoria-Ancona, Italian Cup, many years ago."In England it is totally different because if you play against team who plays for relegation, if you want to win, you should play not 100, but 200 per cent.
"For them it is the best moment in their life. If you don't play well, if you don't play a good game, you can't win."
Manchester City boss Roberto Mancini accepts he could lose his job even if he won the FA Cup - but is thinking only of a long and successful future.
– Manchester City boss Roberto Mancini
I won seven trophies at Inter in four years and they sacked me after four years.This is football. I know football enough to understand this situation.I want to do only my job well, if it is possible, and continue to win every year. This is my target.I don't have other situations where I want to improve. I think it is important for every club to have a manager who can take a lot of decisions about the team, but now it is important we win this trophy.
Mancini's position has been the subject of recurring speculation throughout the season and it may be questioned again if City suffer a shock loss to relegation-threatened Wigan in the final this weekend.
But the Italian has spoken often enough about how confident he feels in the post and we wants to continue bringing silverware to the Etihad Stadium.
Defeating Wigan would bring a third major trophy in three seasons and this is his only concern.
Police said they are investigating incidents involving Millwall supporters at today's FA Cup semi-final that left some fans bloodied and younger ones in tears.
A Scotland Yard spokesman said:
Ten people have been arrested following sporadic disorder among fans in the Millwall supporters' area at Wembley. Investigations into the circumstances of the incidents are continuing.
Ten football fans were arrested after fighting broke out in the Millwall supporters' area during the south London club's defeat to Wigan in the FA Cup semi-final at Wembley, the Metropolitan Police said tonight.
Millwall football fans fought each other at Wembley as their side lost 2-0 to Wigan in the FA Cup semi-final today.
Police intervened after MIllwall fans fought each other in the stands at Wembley as the London club lost 2-0 to Wigan Athletic in the FA Cup semi-final.
Former Millwall player Paul Ifill said Lions fans who fought each other in the stands during today's FA Cup defeat to Wigan "tainted the day".
Gutted boys had a go 2nd half Wigan 2 gd great cup run now bk 2 the league must stay up! Shame that a few so called fans tainted the day!
Wigan Athletic have reached the FA Cup final for the first time in their history, beating Millwall in a match that was marred by scenes of violence involving fans of the London club.
Shaun Maloney and Callum McManaman scored in a 2-0 win for the Latics, whose victory means the club qualify for Europe.
Millwall fans could be seen fighting each other in the stands throughout the second half of the Wembley semi-final.
Chelsea take on Manchester United at Stamford Bridge this lunchtime in their FA Cup, sixth round replay. The Blues will be looking to bounce back from a 2-1 defeat to Southampton in the Premier League on Saturday and secure a place in the semi-final.