Deja vu — coincidence or a rip off?

[sowhat]

Have you ever had a feeling, on hearing a new rock'n'roll hit, that you have heard it all before? I, for one, often do. Not necessarily a note-by-note copy, but something that reminds of something else. Anybody wants to play a "guess what it was" game? Posting a link to a track or a vid for a song that reminds you of and then asking, "so where did you hear that before"?
A couple of easy ones.

Does that remind you of something?
And another one — doesn't the riff sound somehow familiar?

Toodle pip. Er, i mean, hope you have a good time.

[scotty]

Sheena the top video is not longer available.Its not letting you embed.

[charlyg]

Free Bird - Green Grass and High Tides Forever
Every Picture Tells a Story - Box of Miracles

That would be, in order, Lynyrd Skynyrd, Outlaws, Rod Stewart, Barefoot Servants.

Just to name a couple.

[sowhat]

Strange, Scott, because it works fine for me. Anyway, it's "Get a job" by the Offspring. So what does it remind you of?

[captsandwich]

Without seeing the first video, I was going to go find a version of that song. Every time I hear it on the radio, I sing OB-LA-DI, OB-LA-DA over the first chorus and then switch stations.

[sowhat]

Indeed, Greg. Now how about the second one? Where's that riff from, originally?

[winston]

It sounds a bit like like Southern Cross. Sped up of course.

[captsandwich]

I know the Green Day one is familiar, but I can't place it. The first line of that song "This is public service..." always makes me wish it was Know Your Rights by the Clash.

Another well-documented sound alike is Come as You Are by Nirvana
http://youtube.com/watch?v=bOL5cpwTkes&feature=related
(Can't embed)
Anybody know the original?