One striking case is Sheryl Crow's All I wanna do, a blatant copy from Stealers Wheel's Stuck in the middle with you.

One case I heard about, but didn't agree with, was Slade's Let's call it quits which was just a standard rocker. Apparently somebody sued them over copyright infringement and won, after which they had to withdraw the single which was already hitting the charts. If that song was a copyright violation so are thousands of songs like it.

For a more creative case of ripping off the elders, see Blur.