Zeno just brought this to my attention.

Scottish producer Calvin Harris recently accused Chris Brown of lifting his 2009 track “I’m Not Alone”.  Chris Brown’s new single “Yeah 3x” features a nearly identical synth hook.

The Scottish musician said he “choked on [his] cornflakes” when Brown’s new single, Yeah 3x, came on the radio while he was eating breakfast.
http://www.guardian.co.uk/music/2010/oct/05/calvin-harris-chris-brown

After listening to these tracks for a few minutes I’m now reminded of DJ Sammy‘s 2002 dance cover of Bryan Adam’s  “Heaven” (Featuring Do). There’s probably a few hundred more of these out there.