Use it, Abuse It

Rhymefest - Devil's Pie (2006: Blue Collar)
 sampled:
The Strokes - Someday (2000: Is This It)
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The Go! Team - Everyone's a V.I.P. to Someone
(2004: Thunder, Lightning, Strike)
 sampled:
The 5th Dimension - Stoned Soul Picnic
(1968: Stoned Soul Picnic)
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Jens Lekman - A Sweet Summer's Night on Hammer Hill (2004: You Are the Light EP)
 sampled:
Martha Reeves and the Vandellas - (Love is Like a) Heat Wave (1963: (Love is Like a) Heat Wave)
 and
The Shangri-Las - Remember (Walkin' In the Sand) (1964: Remember (Walkin' In the Sand))
 which was TOTALLY ripped off in the McCartney/Harrison lead vocal section of this John Lennon/Beatles/Threetles song:
The Beatles - Free as a Bird (1995: Anthology 1)
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Gianfranco Reverberi - Last Man Standing (1968: Preparati la bara!)
 - This is from the soundtrack to 'Viva! Django'... the sequel to 'Django' which inspired 'Sukiyaki Western Django.' I'm sure you can tell what this led to.