Train Kept A Rollin' - Aerosmith better than Johnny Burnette's Rock 'n' Roll Trio
Don't Be Cruel - Cheap Trick better than Elvis
Sea of Love - Honeydrippers better than Phil Phillips with The Twilights
It's Just A Matter of Time - Randy Travis better than Brook Benton
His Latest Flame - Scorpions better than Elvis
The Loco-Motion - Grand Funk Railroad better than Little Eva
Ring of Fire - Social Distortion better than Johnny Cash
Dancing In The Street - Van Halen better than Martha and the Vandellas
Hazy Shade of Winter - Bangles better than Simon and Garfunkel
You Keep Me Hangin' On - Kim Wilde better than The Supremes
Mony Mony - Billy Idol better than Tommy James and the Shondells
Cum On Feel The Noize - Quiet Riot much, much, MUCH better than Slade
Gold Dust Woman - Hole better than Fleetwood Mac
Cars - Fear Factory featuring Gary Numan better than Gary Numan's own original
Last Kiss - Pearl Jam better than J. Frank Wilson
I'm A Believer - The Monkees (and Smash Mouth, for that matter) better than Neil Diamond
You Really Got Me - Van Halen better than The Kinks
I actually have a playlist in my iTunes that has only originals followed by their covers. It has 171 songs for 9.6 hours. Not all covers are better than the originals, of course.