She may be marrying the wrong guy, but Juliet (Keira Knightley) and Peter's (Chiwetel Ejiofor) wedding is still quite magical. After swapping I-do's in a gorgeous church in front of all their loved ones, the happy couple walks back down the aisle and is stopped by someone singing All You Need is Love.
As he continues, guests sporadically pop up playing instruments. This lovely surprise was all planned by Peter's best friend Mark (Andrew Lincoln), who happens to be in love with Juliet. But, that's a different story.