Song intro's that sound just like Beatles songs..

[Greebo Ogg]

Uhm, yeah. Like the title said. Any songs that start off and make you say; "Hey, ain't that so-and-so by The Beatles", and then turn out to be something completely different?

Help me out here! It's to fool a Beatles fan at a pub-quiz...

[Ximenean]

Probably deliberate, considering who it's by, but the start of Julian Lennon's "Saltwater" is highly reminiscent of "Strawberry Fields Forever".

[GraceTX]

The intro of Gomez's "We Haven't Turned Around" (the version on the B-side album Abandoned Shopping Trolley Hotline) is also very reminiscent of "Strawberry Fields Forever".

[RealityChuck]

Defintely deliberate, but you may be able to use some of the Rutles songs. Neil Innes (http://www.neilinnes.org/audio/audio.htm) has several MP3s that work very well -- most importantly "Piggy in the Middle."